Professors of Physics, Graduate School of Science

Professors with 「*」 do not take graduate students.
Professors with 「#」 do not take master's graduate students.
Professors with 「!」 has spesial report.
> f
Masaki ANDO Department of Physics Gravitational-wave astoronomy Our main target is to expand a new field of gravitational-wave astronomy. For it, we are participating as a main institute to a KAGRA project and constructing a large-scale cryogenic laser interferometer for gravitational-wave observation at Kamioka, Gifu. We are also developing key components for DECIGO, a space gravitational-wave telescope. In addition, we are working for experimental tests of relativity, and quantum measurements using laser interferometers.
Shoji ASAI Department of Physics particle physics
Aya BAMBA Department of Physics
Kenji FUKUSHIMA Department of Physics Nuclear Theory We investigate various phenomena originating from the "strong interaction" that is associated with one of the most fundamental forces in nature. Quarks and gluons interact strongly to form hadrons such as pions, nucleons, and so on, and hadrons are constituents of any materials we know. From the same theory of the strong interaction, unexpectedly amusing physics can appear in special environments like high temperature, high density, or strong background (electromagnetic or gravitational) fields. We are pursuing novel phenomena based on this established and yet profound theory of the strong interaction.
Chikara FURUSAWA Department of Physics Biophysics (Theory/Experiments) The aim of our study is to understand robustness and plasticity of complex biological dynamics involving a large number of components, including adaptation, evolution, development and immune system. By using computer simulations of simple models, theoretical analysis, and high-throughput experimental measurements, we will try to extract universal characteristics of biological dynamics and to establish macroscopic theories for biological robustness and plasticity.
Koichi HAMAGUCHI Department of Physics Theoretical Particle Physics I am interested in physics beyond the energy scale of the Standard Model of particle physics, and doing research aiming at a more fundamental unified theory underlying in nature. I have worked on model building, phenomenological study and particle cosmology of models beyond the Standard Model, such as the supersymmetric models. I also plan to pay attention to the latest results from high energy experiments and astrophysical observations, and then feed them back to theoretical research.
Shuji HASEGAWA Department of Physics Surface Physics Our research targets are atomic arrangements, electronic band structures, electronic/spin transport, optical responses, phase transitions and other functional properties of a few atomic layers, atomic wires, atomic clusters, and other nanometer-scale structures formed on crystal surfaces such as semiconductors, metals, and topological insulators, etc. We utilize various kinds of experimental techniques such as electron diffraction/microscopy, scanning tunneling microscopy/spectroscopy, photoemission spectroscopy, microscopic four-point probe methods, molecular beam epitaxy, and focused ion beam techniques. We recently found single-atom-layer superconductors, and suppression of backscattering of carriers at topological surfaces, etc.
Masamitsu HAYASHI Department of Physics Experimental condensed matter physics Experimental condensed matter physics and quantum Spintronics. Spin transport, magnetism and optical response of thin film heterostructures.
* # Hideo HIGUCHI Department of Physics Biophysics
Hosho KATSURA Department of Physics Condensed matter physics, Statistical physics [Condensed matter theory] (1) Strongly correlated systems: quantum magnetism, multiferroics, low-dimensional systems, Hubbard-type models, quantum entanglement. (2) Topological systems: Hall effects, topological insulators, Majorana fermions. [Statistical mechanics] Algebraic structures behind classical and quantum solvable models and their applications. Nonlinear phenomena in physics.
Kentaro KITAGAWA Department of Physics
Hidetoshi KUBO Institute for Cosmic Ray Research Gamma-ray Astrophysics We observe cosmic gamma rays from an active galactic nucleus with a supermassive black hole, a neutron star with a strong magnetic field, and a gamma-ray burst to study their structures, physical conditions, and the mechanism of generating and releasing the huge energy. We furthermore conduct the dark matter search and verification of the quantum gravity theory through cosmic gamma-ray observations. We analyze the data observed with the ground-based telescope MAGIC and the gamma-ray satellite Fermi. In addition, we are constructing the next-generation gamma-ray observatory CTA in the Canary Islands and Chile.
Akito KUSAKA Department of Physics Observational Cosmology /Experimental Astrophysics Why and how did our universe begin? How has it evolved? These are the key questions of our research. We explore these fundamental questions primarily through observing cosmic microwave background (CMB), the light from the very beginning of the universe. Through CMB, we study not only the fundamental nature of the universe, but also particle physics as well, such as the nature of neutrinos and unknown particles. Our approach is that of experimental physics, and our research entails development of cutting edge technologies such as those using superconducting instrumentation, and low-temperature and microwave engineering.
Haozhao LIANG Department of Physics Nuclear Theory Our research mainly focuses on the nuclear many-body theories and the relevant interdisciplinary studies in nuclear physics, nuclear astrophysics, and particle physics. Key topics include: nuclear density functional theory (DFT), structure of exotic nuclei, hidden symmetries in atomic nuclei, nuclear collective excitations, nuclear weak-interaction processes and r-process nucleosynthesis, etc.
Yutaka MATSUO Department of Physics High energy physics (Theory) Subjects: Quantum Gravity, Superstring theory, Quantum field theory and related mathematica physics. More concretely, (1) Formulation of Branes in M-theory (2) related new symmetry and geometry (3) infinite dimensional symmetry appearing in 4D Yang-Mills and 2D solvable models
Takeo MOROI Department of Physics Particle physics, cosmology Particle physics, cosmology
Mio MURAO Department of Physics Quantum information (theory) We consider that a quantum computer is not just a machine to run computational algorithms but also a machine to perform any operations allowed by quantum mechanics. We analyze what kinds of new properties and effects may appear in quantum systems by using quantum computers to improve our understanding of quantum mechanics from an operational point of view. We also investigate applications of quantum properties and effects such as entanglement for information processing, communication, precise measurement and manipulations.
Yasuhiro NAKAJIMA Department of Physics Particle and Astroparticle Physics Experiments My research focuses are studies of nature of neutrinos as elemental particles, as well as astrophysical studies with neutrinos. In particular, we are aiming for the world first observation of Diffuse Supernova Neutrino Backgrounds with the Gadolinium-loaded Super-Kamiokande detector (SK-Gd). Our another major goal is to study matter-antimatter asymmetry with accelerator neutrinos produced at J-PARC. In addition, we are conducting researches towards observations at the Hyper-Kamiokande experiment.
Satoshi N. NAKAMURA Department of Physics Nuclear Physics (Experiment) We are performing experimental research in modern nuclear physics, to understand quantum many-body systems, from quarks to neutron stars, in which the strong interaction plays an important role. Under the international research collaboration, we are performing precise spectroscopy of hypernuclei, which consist of hyperons, including strange quarks, in addition to normal nucleons (protons and neutrons). Our research bases are high-energy electron accelerator facilities such as Jefferson Laboratory (JLab) in the United States, the University of Mainz, Germany (MAMI), and the research center for ELectron PHoton science at Tohoku University (ELPH). In addition to these electron accelerator facilities, we are now leading the next generation project of hypernuclear spectroscopy at J-PARC, Tokai.
Satoru NAKATSUJI Department of Physics
* # Masao OGATA Department of Physics Condensed Matter Theory Condensed Matter Theory: Especially theories in many-body problems where quantum phenomena play essential roles. For example, strongly correlated electron systems, high-temperature superconductivity, magnetism, low-dimensional conductors such as organic conductors, mesoscopic systems, oxides with orbital, spin and charge degrees of freedom, and unconventional superconductivity phenomena. We use field-theoretical methods, exact solutions, renormalization group, variational theory, and numerical simulations.
Shoichi OGIO Institute for Cosmic Ray Research Cosmic ray physics Telescope Array experiment, the largest cosmic ray detector in the northern hemisphere with a detection area far exceeding 1,000 square kilometers, is operated in Utah, USA, to observe the highest energy cosmic rays reaching macroscopic energies of 10 to 20th electron volts. We aim to elucidate the sources that accelerate (elementary) particles to such ultra-high energies and the propagation of such cosmic rays in the universe.
Yasushi OKADA Department of Physics Biophysics We want to answer “What is Life?” through a viewpoint of physics. For that purpose, we have been developing imaging technologies including super-resolution microscopy, in order to make quantitative measurements in living cells, such as the transport within a cell, especially a neural cell. Recently, we have demonstrated that the phase transition of the conformation of a protein polymer, a microtubule, regulates the directionality of the transport. We are also applying non equilibrium statistical physics to the cellular phenomena. For example, we are developing a non-invasive method to measure force exerted to the vesicles during the intracellular transport by applying the fluctuation theorem.
Tohru OKAMOTO Department of Physics Condensed matter physics We study low temperature electronic properties of low-dimensional systems, including the quantum Hall effect on semiconductor surfaces and the superconductivity of monolayer films.
Akito SAKAI Department of Physics condensed matter physics (experiment) Strong correlation between electrons can induce non-trivial electronic states. One of the famous examples is Tomonaga-Luttinger liquid in the interacting one-dimensional electron system. Similarly, such a “strange metal”, where the quasiparticle picture does not hold, can also appear in the three-dimensional system. We find out the ideal system which can be described by a simple Hamiltonian at low temperature, and perform various experiments such as specific heat, magnetization, electric and thermal transport, and magnetostriction. Our goal is to reveal novel quantum states induced by the entanglement.
# Hirofumi SAKAI Department of Physics Atomic, Molecular, and Optical Physics (AMO) We do experimental studies of atomic, molecular, and optical physics. Our research interests are as follows: (1) Controlling alignment and orientation of gas-phase molecules with an intense laser field and its applications. (2) High-intensity laser physics typified by nonperturbative high-order nonlinear optical processes (ex. multiphoton ionization and high-order harmonic generation) and ultrafast phenomena in atoms and molecules. (3) Generation of single attosecond pulses in the soft x-ray region and control of their polarization states, and their applications to the control of ultrafast dynamics of electrons in atoms and molecules. (4) Taking molecular movies by utilizing the x-ray photoelectron diffraction technique with x-ray free-electron laser pulses.
* # Hiroyoshi SAKURAI The Institute of Physical and Chemical Research Experimental Nuclear Physics Heavy Ion Nuclear Physics Research activities covered by our laboratory are the field brought out by the advent of the radioactive nuclear beams. Special emphasis is placed on exotic properties and phenomena for nuclei with extreme isospin. Our research programs are coordinated to exploit these new opportunities and are directed to subjects related to 1) Study of nuclear structure and dynamics of unstable nuclei through development of new methods utilizing fast RI beams, 2) Exploration into limit of nuclear existence by development of RI beams, and 3) Reaction mechanism of heavy ion induced reactions. The experiments are mainly performed using the radioactive beam facility at RIKEN.
* # Yasushi SUTO Department of Physics astrophysics, exoplanet Theoretical and observational studies in astrophysics and exoplanetary science. Specific examples include, construction of galaxy cluster models based on multi-band observations, statistical modeling of non-sphericity of dark matter halos, gravitational lens astronomy, unveiling the nature of dark energy from cosmological galaxy surveys, reliablity of Galactic dust extinction map, probing distant galaxies with stacking analysis, search for dark baryons with soft-X-ray spectroscopy, origin and evolution of angular momentum of exoplanetary systems, and dynamical evolution of multi-planetary systems.
Hidenori TAKAGI Department of Physics Condennsed Matter Physics We are aiming to explore exotic quantum condensates formed by correlated electrons in solids, in particular transition metal oxides, and to unveil the physics behind the phase formation. Of particular interest recently include high temperature superconductivity, quantum spin liquid, non-trivial ordering of spin and charge, topological insulator. We develop novel playgrounds (materials) and, utilizing a varety of probes including charge transport, thermal properties and x-ray and neutron diffractio/scattering, capture the static/dynamic self-organized staructures of correlated electrons.
Kazumasa TAKEUCHI Department of Physics Nonequilibrium Physics, Soft Matter, Biophysics
Synge TODO Department of Physics Computational physics, Condensed-matter theory We are exploring novel methods in computational physics based on stochastic method such as the Monte Carlo simulation, path-integral representation of quantum fluctuations, information compression by using the singular value decomposition and the tensor network, statistical machine learning, etc. By making full use of these powerful numerical methods, we aim to elucidate various exotic phases, phase transitions, and dynamics specific to quantum many-body systems, from strongly correlated systems such as the spin systems and the Bose-Hubbard model to real materials. We are also researching parallelization methods for leading-edge supercomputers, and developing and releasing open-source software for next-generation physics simulations.
Naoto TSUJI Department of Physics condensed matter theory, nonequilibrium physics We are interested in nonequilibrium physics of quantum many-body systems and statistical mechanics. The aim is to realize a new order or new physical property by driving quantum systems out of equilibrium. At first sight, it sounds unlikely to happen because energy injected by an external drive would turn into heat, which would destroy all the interesting properties of quantum many-body systems that might emerge at low energies. However, contrary to our intuition, recent studies have revealed various possibilities that novel states of matter do emerge out of equilibrium. We are trying to understand their mechanism and explore the frontier of nonequilibrium physics.
Shinji TSUNEYUKI Department of Physics Condensed Matter Physics Thoery My research interest is in developing and applying methodologies of computational physics to investigate basic problems in condensed matter physics, especially focusing on dynamics and correlation in many-body systems. Areas of current research include: 1. Properties and structural transformation of materials under high pressure. 2. Structures and reactions of atoms and molecules on solid surfaces. 3. Quantum effect of light particles (protons, muons, etc.) in solids. 4. Impurities in ferroelectric materials. 5. Electronic structure of proteins.
Masahito UEDA Department of Physics cold atoms, quantum information cold atoms (Bose-Einstein condensation, Fermi superfluidity), information thermodynamics, quantum information and measurement,condensed-matter theory
* # Satoshi YAMAMOTO Department of Physics Astrophysics, Interstellar Chemistry Our group is studying physical and chemical processes of interstellar clouds, which are birthplaces of new stars. For this purpose we are running the 1.2 m submillimeter-wave telescope at the summit of Mount Fuji. With this telescope, we are observing the submillimeter-wave emission lines from the neutral carbon atom, which are good tracers for interface regions between the molecular gas and atomic gas. By comparing the large scale distribution of the neutral carbon atom with that of the carbon monoxide molecule, the formation and evolution of molecular clouds are being explored in detail. In addition, we are also conducting the laboratory microwave spectroscopy of free radicals which are related to interstellar molecules.
Masashi YOKOYAMA Department of Physics Experimental particle physics Experimental particle physics. Study of neutrino oscillation using artificial neutrino beams (T2K and Super-Kamiokande experiments). Construction of Hyper-Kamiokande detector. Development of new neutrino detectors.
Naoki YOSHIDA Department of Physics Astrophysics Theoretical astrophysics and observational cosmology. Recent research highlight includes structure formation in the early universe, the nature of dark matter and dark energy. Our research group members work on a broad range of topics from the formation of the first stars and blackholes to the distribution of dark matter in and around galaxies. We use data from galaxy redshift surveys and weak lensing observations to study the large-scale strucutre of the universe. Massive parallel computing such as gravitational N-body simulations and radiation-hydrodynamics is also of our primary interest. We also work with mathematicians and data scientists to develop a Big Data application to analyze literally big data from large telescopes.
Taku GUNJI Center for Nuclear Study Quark and Hadron Physics Quark and Hadron Physics with high-energy heavy-ion collisions: By conducting high-energy heavy-ion collisions at the ALICE experiment at the CERN-LHC, we are studying [1] the formation of the Quark-Gluon-Plasma (new phase of matter existed 10 micro-sec after the BigBang), [2] properties of the Quark-Gluon-Plasma, [3] mechanisms of phase transition to the Quark-Gluon-Plasma and hadronic matter, [4] color confinement and chiral symmetry restoration as the fundamentals of QCD. We are developing another frontier of heavy-ion collisions to explore the properties of the Quark-Gluon-Plasma and hadronic matter under extremely high densities.
Nobuaki IMAI Center for Nuclear Study Experimental Nuclear Physics Nuclear structure of neutron-rich nuclei which will be produced by RIPS or BigRIPS at RIBF are to be studied by employing the low-energy nuclear reactions such as proton resonance elastic scattering. In particular, the nuclei around 32Mg where the nuclear structure suddenly changes are being studied. This experiment can be related to an unknown nuclear force which breaks the isospin symmetry. We are also developing devices to produce a high spin isomer target of178m2Hf, which will be synthesized, and then purified by using the laser resonant ionization. When it is succeeded, long-standing dream of nuclear physics, production of hyper deformation, torus shape of nucleus, would come true.
Yasuhiro SAKEMI Center for Nuclear Study Nuclear physics To explore the mechanism responsible for the generation of observed matter-antimatter asymmetry in the Universe, the research on fundamental symmetry violations and various fundamental interactions using the laser cooled and trapped heavy elements is being promoted. The construction of a facility containing high density of laser cooled radioactive atoms is in progress, and it serves as a center for carrying out several studies on fundamental symmetries.
Kentaro YAKO Center for Nuclear Study Nuclear Physics (Experiment) My research subject is nuclear collective motion, especially the spin-isospin oscillation. Our group engages in producing the excited nuclei via charge exchange or other reactions to study their structure using ion beams of intermediate energies (several hundred MeV per nucleon).
Hidetoshi YAMAGUCHI Center for Nuclear Study Experimental nuclear physics/Nuclear astrophysics The main research is with the low-energy RI beam separator "CRIB", which was installed in the RIBF facility of RIKEN Nishina Center by CNS (Center for Nuclear Study) of Univ. of Tokyo. CRIB, producing low-energy and high-intensity RI beam via direct reactions, is a unique apparatus among low-energy RI beam facilities all over the world. Making use of the distinctive features of CRIB, we are performing unique experimental studies on important reactions in nuclear astrophysics and exotic nuclear structure.
Kipp CANNON Research Center for the Early Universe Observational astrophysics Detection and interpretation of gravitational waves from the collisions of compact objects including black holes and neutron stars, as well from other phenomena.
Kenta HOTOKEZAKA Research Center for the Early Universe Astrophysics and Gravitational-wave Astronomy I'm interested in relativistic astrophysics including black holes, neutron stars, gravitational waves and electromagnetic counterparts of gravitational-wave events. I use several different approaches, e.g., numerical simulations and phenomenological modelings.
Jun'ichi YOKOYAMA Research Center for the Early Universe Cosmology and Gravitational Wave Physics Cosmology of the Early Universe and Gravitational Wave Physics Specific topics of recent research include:inflationary cosmology generation and evolution of density fluctuations baryogenesis origin of dark matter and dark energy nonequilibrium processes in the early universe primordial black holes cosmic microwave background radiation fundamental research on gravitational wave data analysis gravitational wave cosmology
Masaya ISHINO International Center for Elementary Particle Physics Elementary Particle Physics ( Experiment ) [1] Searching for new elementary particles using Large-Hadron-Collider. Through the precise measurement of the new particles, unveil the physics beyond the standard-model. [2] To maximize the possibility to find new particles, develop a new technology on detector, trigger and software and deploy them to the real experiment.
# Toshinori MORI International Center for Elementary Particle Physics Elementary Particle Physics Exploring the mysteries of the Universe by discoveries and studies of new phenomena and particles. In particular, currently working on an international experiment to investigate supersymmetric grand unification of forces and the origin of neutrino masses through rare decays of muons (the MEG and MEG II Experiment). Also working on experimental researches in electron-positron collisions of the world's highest energy at the International Linear Collider (ILC) to study gauge interactions, symmetry breaking (Higgs bosons), and grand unified theories.
Yasuyuki OKUMURA International Center for Elementary Particle Physics High energy physics (experiment) We participate in the ATLAS experiment and carry out research through international collaboration and in the midst of international competition with the aim of discovering signs of new physics in experimental data. By analyzing experimental data, we are testing hypotheses regarding new phenomena beyond the Standard Model of the particle physics. In addition to data analysis, we also conduct wide-ranging research activities, such as operating and making improvements to the detector and hardware trigger of the ATLAS experiment and developing high-speed trigger electronics with cutting-edge technologies. One of the most important objectives of our group is to maximize the potential for new physics discoveries at the LHC through my work both with hardware and software.
Wataru OOTANI International Center for Elementary Particle Physics Elementary Particle Physics The research interest of our lab is in experimental particle physics with particle accelerators aiming at understanding the fundamental law of the universe. The main projects are as follows. (1) MEG/MEG II experiment in search for rare muon decay with the highest sensitivity utilising the world’s most intense muon beam to study new physics beyond the standard model such as SUSY-GUT. We are also working on R&D of new detector technologies for next-generation experiments with even higher sensitivities. (2) R&D toward the realisation of the International Linear Collider (ILC), which is a future energy-frontier electron-positron collider.
Ryu SAWADA International Center for Elementary Particle Physics Elementary Particle Physics Experimental elementary particle physics. I participate the LHC ATLAS experiment at CERN to discover the new physics beyond the standard model by searching for new particles such as supersymmetric particles, dark matter and new long-lived particles. For improving the sensitivity of searches, I study applications of new techniques such as deep-learning and quantum computing in high-energy physics researches. I also study on the new physics reach of the future circular collider, which is a proposed 100 TeV hadron collider at CERN.
Junichi TANAKA International Center for Elementary Particle Physics Experimental particle physics Experimental particle physics: we aim to understand how to describe the universe with a few fundamental formula of elementary particles through experiments of high energy accelerators. We currently join LHC ATLAS experiment at CERN and search for additional Higgs particle, SUSY, extra dimension and so on, that is, the BSM physics. We also work on R&D of high-speed data transfer, energy reconstruction algorithm@FPGA etc for the ATLAS LAr EM calorimeter upgrade. In addition, we are interested in the future collider, for example, 100TeV hadron machine and just have started some studies for it.
Koji TERASHI International Center for Elementary Particle Physics Particle Physics Experiment, Applications of Quantum Information Experimental particle physics and applications of quantum information: The main researches are twofold: 1) Search for new phenomena and perform precise measurements of the Standard Model processes using the ATLAS detector at the CERN-LHC. We are also working on the scenario of Supersymmetry searches at a future 100 TeV hadron collider. 2) Explore the applications of quantum information science to fundamental physics and industry. We are interested in the algorithmic development of quantum machine learning and quantum simulation, and the optimization of quantum circuit design for the present and near-term quantum computers.
Katsuaki ASANO Institute for Cosmic Ray Research High Energy Astrophysics (Theory) I theoretically study high-energy astrophysical phenomena, such as relativistic jets from active galactic nuclei, gamma-ray bursts, pulsars, and merger of binary neutron stars. In this field, there remain many unsolved problems. I especially study the formation of relativistic outflows, particle acceleration in jets, emission mechanisms of electromagnetic waves or neutrinos from high-energy particles. Our research supports the multi-messenger astronomy, which probes astronomical phenomena through collaborating observations of electromagnetic waves, cosmic rays, neutrinos, and gravitational waves.
Yoshinari HAYATO Institute for Cosmic Ray Research Neutrino physics (experiment) 1) Neutrino oscillation experiments Mainly working on the accelerator based long baseline neutrino oscillation experiments. 2) Neutrino-nucleus scattering experiments including the development of a simulation program of neutrino-nucleus scattering. 3) R&D of the data acquisition system for the experiments.
Masahiro IBE Institute for Cosmic Ray Research Theoretical Particle Physics In my research, I have focused on physics beyond the Standard Model which completes the Higgs mechanism at the energy scale around the TeV. The evidences of the new physics are expected to be discovered at the coming generation of collider experiments such as the large hadron collider (LHC) experiments. Especially, I have put emphasis on the interplay between the phenomenological aspects of the new physics and its cosmological/astrophysical implications. By the rapid progress in the cosmological/astrophysical observations as well as the full operation of the LHC experiments, the studies which exploit both particle phenomenology and cosmology/astrophysics will be more important than ever.
* # Takaaki KAJITA Institute for Cosmic Ray Research gravitational wave, neutrino physics Gravitational wave will be studied by a very high sensitivity, large scale (3km X 3km) laser interferometer, which is under construction at Kamioka. Neutrino oscillations are studied with Super-Kamiokande by observing atmospheric neutrinos.
Masahiro KAWASAKI Institute for Cosmic Ray Research Cosmology Particle Cosmology
Shinji MIYOKI Institute for Cosmic Ray Research Gravitational Wave Physics I am working toward the direct detection of gravitational waves that is predicted by general theory of relativity. We have finished research and developments for over 20 years by using proto-type laser interferometers, and then we are now developing "KAGRA" Large-scale Cryogenic laser interferometer Telescope. I would like to detect gravitational waves and to start gravitational wave astronomy as one of GW detectors as LIGO, VIRGO and GEO600 in the world. In addition to gravitational wave research, I am trying to observe macroscopic quantum mechanics by using ultra-precise length measurement technique.
Shigetaka MORIYAMA Institute for Cosmic Ray Research cosmic ray/particle physics My fields of interest include dark matter, axions, neutrino physics, and proton decay. My research comprises of two experimental approaches. The first approach involves the use of a liquid xenon target that is sensitive to an energy scale ranging from sub-keV to MeV. The XENONnT detector with ~10 ton of liquid xenon is used to discover dark matter particle in the Universe with the world best sensitivity. The second approach involves the use of Super-Kamiokande. The hierarchy of neutrino masses and CP violation in the lepton sector may be crucial for understanding the existence of matter in the Universe, and an observation of proton decay clearly indicates a large framework of particle physics. We are working to realize a much larger detector, the Hyper-Kamiokande.
# Masayuki NAKAHATA Institute for Cosmic Ray Research neutrino astronomy Research on neutrinos using the Super-Kamiokande detector. Especially, observations of supernova neutrinos and solar neutrinos are performed. With these observations, I study elementary-particle physics and neutrino astronomy.
Shoei NAKAYAMA Institute for Cosmic Ray Research Experimental Particle and Astroparticle Physics
# Masatake OHASHI Institute for Cosmic Ray Research Gravitational Wave Physics We want to detect gravitational waves from various sources as compact binary by KAGRA. The observation of KAGRA will start at 2018.
Kimihiro OKUMURA Institute for Cosmic Ray Research particle physics, cosmic ray physics I am interested in neutrino physics, and involved in Super-Kamiokande experiment, T2K experiment, and Hyper-Kamiokande project. We are studying for the issues of leptonic CP asymmetry and mass hierarchy via the precise measurements of neutrino oscillation in the atmospheric and accelerator neutrinos. Another research on the cosmic ray physics is being done by the flux measurement of the atmospheric neutrino. We plan to promote the development of the future neutrino detector and instrument in future.
Masami OUCHI Institute for Cosmic Ray Research Astrophysics We study the early universe by observations. Armed with the state-of-the art telescopes such as Subaru and Hubble (+ALMA), we aim to push the today's observational frontier towards the very high redshift universe that no one has ever seen by observations. Our goal is understanding physical processes of galaxy formation at the early stage and the relevant event of cosmic reionization.
* # Hiroyuki SAGAWA Institute for Cosmic Ray Research Cosmic-ray physics Ultra-high energy cosmic rays with more than 10^{20} eV were observed by AGASA. We completed the construction of the Telescope Array [TA] observatory, which consists of an array of surface detectors with an area of about 700km^2 and air fluorescence telescopes in order to verify or refute the existence of the highest energy cosmic rays and explore the origin. We will study energy spectrum, arrival direction, and chemical composition of the extremely high energy cosmic rays.
Takashi SAKO Institute for Cosmic Ray Research Astroparticle Physics
* # Makoto SASAKI Institute for Cosmic Ray Research Astroparticle Physics, Elementary Particle Physics We make observations of very-high energy gamma, nuclei, neutrinos, and optical flashes from violent celestial objects with wide angle high resolution compound-eye optical telescopes deployed on Mauna Loa on Hawaii Island toward night sky and the earth. We are planning to make observations simultaneously with compound-eye optical telescopes deployed at four sites on Hawaii Island, which are scaled up from the Ashra-1 detector units and the world largest astronomical tau neutrino telescope, i.e. Ashra Neutrino Telescope Array (Ashra NTA). We are pioneering full-fledged particle astronomy with PeV-EeV neutrinos and TeV-PeV gamma-rays by clearly identifying positions of the unrevealed source objects.
Hiroyuki SEKIYA Institute for Cosmic Ray Research Astroparticle physics Neutrino experiments and dark matter searches using Super-Kamiokande, EGADS, XMASS and other detectors. Super-Kamiokande Gd project has been started in order to detect the diffuse supernova neutrino background.
Masato SHIOZAWA Institute for Cosmic Ray Research cosmic ray and elementary particle experiments My research interests are experimental tests of unification of elementally particles and their forces by nucleon decay searches and neutrino oscillation studies. I have been participating the Super-Kamioande, K2K, and T2K experiments. As a project leader, I am aiming to realize the next generation detector Hyper-Kamiokande.
Hideyuki TAGOSHI Institute for Cosmic Ray Research Gravitational Wave Physics and Astronomy
# Masato TAKITA Institute for Cosmic Ray Research High-energy cosmic-ray astrophysics We set up a large (37000-m**2) air shower arrays at Yangbajing in Tibet,China. We aim at observing multi-TeV cosmic gamma rays from astoronomical point sources such as AGN (active galactic nuclei), supernova remnants, GRBs (galactic gamma-ray bursts), etc. At the same time, we are tryingto disentangle the old enigmas in cosmic-ray physics: the origin of cosmic rays and their acceleration mecanism and the chemical composition of the primary cosmic rays. Those who find research fun in discussing with colleagues and in cooperative work (detector construction, for example) maybe more suitable than those who like to do physics by themselves. Normally, we do data analysis and development of new detectors at ICRR (Institute for Cosmic Ray Research) at Kashiwa.
* # Masahiro TESHIMA Institute for Cosmic Ray Research High Eenergy Gamma Ray Astronomy High Energy Gamma Ray Astronomy. (1) Study of particle acceleration and high energy gamma ray emission in Super Nova Remnants, Active Galactic Nuclei and Gamma Ray Bursts. (2) Indirect Search for Dark Matters. (3) Study of Extragalactic Background Light using gamma ray absorption. (4) Research and Development for the next generation high energy gamma ray facility, Cherenkov Telescope Array.
Takashi UCHIYAMA Institute for Cosmic Ray Research Gravitational wave physics Detection of gravitational wave which is predicted in Einstein's general theory of relativity and establishment of gravitational wave astronomy.
Takanori YOSHIKOSHI Institute for Cosmic Ray Research Very high energy gamma-ray astrophysics T.Y. researches physics of celestial objects emitting very high energy gamma rays using imaging atmospheric Cherenkov telescope arrays. In particular, he aims to resolve the mystery of the origin of cosmic rays by observing supernova remnants, pulsar wind nebulae, etc. He is also doing R & D studies for next generation atmospheric Cherenkov telescopes.
Hidefumi AKIYAMA The Institute for Solid State Physics Laser and optical physics in semiconductors Advanced laser micro-spectroscopy is developed and applied to various semiconductor nano-structures, in order to understand and control their optical properties quantum mechanically which vary with their size and shape. Subjects are, for example, physics of short-pulse generation from semiconductor lasers, solar cells, firefly bio-luminescence, micro-spectroscopy and imaging with solid immersion lens, and time-resolved spectroscopy for characterization and development of novel samples. We have particular interests in finding and solving fundamental physics problems which limit semiconductor and optical technologies.
Jiro ITATANI The Institute for Solid State Physics Atomic, Molecular, and Optical (AMO) Physics Our main research subjects are the development of advanced intense ultrashort-pulse lasers and their applications to attosecond sciences. We especially work on (i) the development of waveform-controlled intense light sources, (ii) generation of attosecond soft-X-ray pulses, (iii) coherent control of ultrafast processes in a strong laser field, and (iv) ultrafast soft-x-ray spectroscopy on femtosecond to attosecond time scales.
Takeo KATO The Institute for Solid State Physics Condensed Matter Theory Theory for mesoscopic systems; evaluvation of conductance and noise power, treatment of electron-electron interaction, basic theory for nonequilibrium states, and new argothim of numerical calculation.
* # Shingo KATSUMOTO The Institute for Solid State Physics quantum transport, low temperature physics
Naoki KAWASHIMA The Institute for Solid State Physics condensed matter physics, statistical physics We are developing new computational methods and algorithms for analytically intractable problems in condensed matter theory. We also use them in large-scale computing on parallel computers. Specifically, we study quantum spin liquids by tensor-network method, Z2 vortex dissociation transition by cluster algorithm, spinon deconfinement critical phenomena by quantum Monte Carlo, optical lattice systems by worm algorithm, and spin glass critical phenomena.
Koichi KINDO The Institute for Solid State Physics High-field Physics
Takeshi KONDO The Institute for Solid State Physics angle-resolved photoemission spectroscopy The angle-resolved photoemission spectroscopy (ARPES) is a powerful technique to visualize the band structure. With the spin-resolved technique, we can identify the spin-polarized character of the band. In addition, the time-resolved ARPES realized with a pump-probe technique can track the reordering process of electron system from its nonequilibrium state. In our laboratory, we utilize these various ARPES techniques and explore novel electronic states of matter. Furthermore, we develop a new ARPES machine capable of achieving both the lowest measurement temperature and the highest energy resolution in the world by innovating a 3He cryostat and a laser source.
Iwao MATSUDA The Institute for Solid State Physics spectroscopy physics, surface physics We develop new spectroscopy techniques using synchrotron radiation and X-ray free electron laser. With the new probes, we investigate spin-polarized electronic states and dynamics in monatomic layers that have intriguing Dirac Fermions. We aim to make the comprehensive educations to students and we also promote concerting researches with various quantum beams, such as positrons and electrons.
Ryusuke MATSUNAGA The Institute for Solid State Physics THz-MIR Extreme Nonlinear Optics in Solids Light-matter interaction provides deep understandings of the fundamental properties of materials and how to control it artificially by light. Terahertz and mid-infrared light sources allows us to reveal elementary excitations in solids, cooperative phenomena in many-body systems, and functionality of novel materials. With developing state-of-the-art pulsed laser system, we explore THz-MIR extreme nonlinear optics and nonequilibrium dynamics in solids induced by intense light field.
Hiroshi NOGUCHI The Institute for Solid State Physics soft-matter, biophysics Study of soft-matter and biophysics using theory and simulation. Particularly, dynamics of biomembrane from nano to micro meter. i) Deformation of red blood cells in microvessels. ii) Fusion and fission of biomembrane. We also develop hydrodynamic methods and coarse-grained molecular models.
Takashi OKA The Institute for Solid State Physics condensed matter theory
Masaki OSHIKAWA The Institute for Solid State Physics Condensed Matter Theory / Statistical Mechanics My study centers around the intersection of condensed matter theory, statistical mechanics, and field theory. Examples of my research include: * Quantized magnetization plateaux in quantum spin systems * Commensurability and topology in quantum many-body systems * Magnetic-field effects on a junction of three quantum wires (application of boundary conformal field theory) * Field-theory approach to Electron Spin Resonance in quantum spin chains I work on abstract theories as well as analysis and prediction of experimental data; often they are well connected.
Taisuke OZAKI The Institute for Solid State Physics Computational Materials Science In accordance with development of recent massively parallel computers, first-principles calculations based on density functional theories (DFT) have been playing a very important role in understanding and designing properties of a wide variety of materials. We have been developing efficient and accurate methods and software packages to extend applicability of DFT to more realistic systems as discussed in industry. Although the computational cost of the conventional DFT method scales as the third power of number of atoms, we have developed an O(N) Krylov subspace method, of which computational cost scales only linearly, based on nearsightedness of electron. In addition to this, we are aiming at realization of materials design from first-principles.
Osamu SUGINO The Institute for Solid State Physics Computational materials science Our research, the first principles calculation of materials, is motivated by keen interest in explanation of properties of materials and understanding of phenomena occurring in condensed phases by solving basic equations like Schroedinger equation. We also develop new computational methods to make more and more complex phenomena within the target of first principles calculation. The present theme: stimulated electron-ion dynamics in the condensed phases, tunneling phenomena via nano-structures or ultrathin layers, and catalytic reactions occurring at surface or interfaces.
Masashi TOKUNAGA The Institute for Solid State Physics solid state physics in high magnetic fields We study various kinds of magnetic materials, semimetals/semiconductors, and superconductors in pulsed high magnetic field with using various homemade state of the art experimental techniques. Recently, we found novel non-volatile resistive memory effects at room temperature in a multiferroic material and clarified fundamental physics of several topological semimetals in high magnetic fields.
Hirokazu TSUNETSUGU The Institute for Solid State Physics Condensed Matter Theory Thoery of strongly correlated eletron systems. Electronic states, magnetism, superconductivity, transport phenomena in compounds of transition metal, rare earth, or actinide elements. Quest of new quantum orders driven by electron-electron interactions, interplay of electron spin and orbital degrees of freedom, and electron-lattice couplings.
* # Yoshiya UWATOKO The Institute for Solid State Physics Solid state physics under high pressure Research projects have been performed under multiple-extreme conditions of low temperatures, high pressure and high magnetic fields. Pressure-induced effects and phase transitions in the strongly correlated electron systems are investigated.
# Osamu YAMAMURO The Institute for Solid State Physics Chemical Physics, Soft Matter My laboratory is studying chemical physics of complex systems by means of neutron scattering, X-ray diffraction, calorimetric, dielectric (electric conductometric) and viscoelastic techniques. Our present interests are glasses, supercooled liquids, water, clathrate compounds, ionic liquids, hydrogen conductors, and single molecule magnets. We are studying them from the three different points of view, i.e., "structure", "dynamics", and "thermodynamics". Our goal is to reveal the essence (simple and beautiful principle) hidden in complex systems and phenomena.
Fujihiro HAMBA Institute of Industrial Science Fluid Physics Fluid physics: physics and modeling of inhomogeneous turbulence. The effect of turbulence on the mean field can be modeled in terms of transport coefficients such as the eddy viscosity. We derive turbulence models by using statistical theory for turbulence; we investigate the mechanism of turbulence and assess models by performing numerical simulations. The present research topics are hybrid turbulence model, analysis of nonlocal eddy viscosity and diffusivity in turbulence, analysis and modeling of rotating and swirling turbulent flows, and modeling the dynamo mechanism in magnetohydrodynamic turbulence with its application to astronomical magnetic fields.
Naomichi HATANO Institute of Industrial Science Condensed-Matter Theory and Statistical Physics We mainly study condensed matter physics and fundamental quantum physics theoretically. We cover both classical and quantum, equilibrium and non-equilibrium. We decide students' themes based on their picks, because of which we work on variety of topics. The current topics include: (1) non-Hermitian quantum mechanics,; (2) Quantum walk; (3) Non-equilibrium Non-Markovian quantum dynamics;; (4) Analysis of complex networks. We encourage you to visit our office. Contact Hatano.
Akira EJIRI Department of Complexity Science and Engineering Plasma Physics Plasma is characterized by huge degree of freedom and strong interaction between particles or fluid elements. Plasma shows nonlinear response, an in a state far from equilibrium. In order to investigate the physics arising from these features, we put emphasis on fluctuations. Our main plasma device is the TST-2 spherical tokamak (Univ. Tokyo), and we operate it in cooperation with Prof. Takase's group. Typical plasma parameters are: major radius 0.38m, minor radius 0.25m, toroidal magnetic field 0.2 T, plasma current 100 kA. We also participate in experiments at LHD (NIFS) and JFT-2M (JAERI) devices.
Akinao NOSE Department of Complexity Science and Engineering biophysics Biophysics of the nervous system. We use the fruit fly, Drosophila, as a model to try to understand the operational principle of neural circuits, based on the realistic neuronal connectivity and activity pattern. We use optogenetics, calcium imaging and electrophysiology to record and manipulate neural activity and connectome analyses to dissect neural wiring. By systematically using these techniques, we try to elucidate the functional connectivity among component neurons and information processing of the neural circuits.
Masato OKADA Department of Complexity Science and Engineering Brain science, Condensed matter physics We study brain functions such as memory and vision using methods of statistical mechanics. We also develop statistical-mechanical informatics focusing on the similarity between the framework of Bayesian inference and that of statistical mechanics. We have recently started to promote ‘Data-Driven Science’ for the purpose of establishing an efficient methodology to extract scientific knowledge from high-dimensional data.
Naoto TSUJII Department of Complexity Science and Engineering Plasma Physics Wave physics in fusion plasmas. Wave-particle interaction analysis with numerical simulations. Development of diagnostics for high temperature plasmas. Experimental research of basic plasma physics on the TST-2 spherical tokamak device located at the Kashiwa campus. Collaborations related to wave physics with JT60-SA (QST), LHD (NIFS), LATE (Kyoto Univ.), QUEST (Kyushu Univ.).
Munehito ARAI Department of Arts and Science Biophysics Biophysics, protein folding, and protein design. Proteins are essential substances that drive life processes. (1) We study physical properties of proteins, in particular, how proteins form specific structures and exert their functions. We also study the structure-function relationship in intrinsically disordered proteins. (2) We develop novel proteins useful in medicine and industry.
Yusuke KATO Department of Arts and Science Theoretical Physics of Condensed Matter Theory of Condensed Matter. Superconductivity, Superfluidity and Chiral magnetism
* # Mitsuhiro KATO Department of Arts and Science Particle, String and Field theory Research on the unified theory of elementary particles and the quantum structure of spacetime based on the string theory. Non-perturbative study of quantum field theory.
Kuniyoshi SAKAI Department of Arts and Science Neuroscience of Language, Neuroimaging
Miho YANAGISAWA Department of Arts and Science Soft Matter Physics, Biophysics We are mainly conducting research on the physical properties of soft matter confined in cell-sized spaces, and based on that knowledge, we also aim to physically understand life phenomena and create new micromaterials. is. As an example * Cell-sized soft matter thermal statistical mechanics (phase transition, phase separation, molecular diffusion) * Development of microscale dynamics measurement methods using microfluidic devices and microcapillaries. * Reproduction of life phenomena by artificial cells and their physical understanding.
# Takao NAKAGAWA The Institute of Space and Astronautical Science Infrared Astrophysics Using Infrared observations from space-borne platforms, especially the infrared astronomical satellite AKARI, I am working on the birth and evolution of various types of objects in the universe, namely (1) galaxy formation and evolution, (2) formation of stellar and planetary systems. I am also working on the projects to develop unique observation instruments, which enables the above mentioned targets. The current main project is SPICA, which is expected to play cruicial roles in every field of astronomy.
Hiroya YAMAGUCHI The Institute of Space and Astronautical Science High-Energy Astronomy, Laboratory Astrophysics My research interest is on high-energy astronomical phenomena, such as those observed in stellar flares, supernova remnants, and galaxy clusters. Observations of these objects using artificial satellites allow us to reveal how the Universe has evolved to date. I'm also developing facilities enabling "laboratory astrophysics" to reproduce radiation processes relevant to the high-energy astronomical objects on ground. In my main institute JAXA/ISAS, I'm involved in the XRISM project as Deputy Project Scientist, responsible for the science lead. Before coming back to ISAS last year, I was in the US for 7.5 years.
Noriko YAMASAKI The Institute of Space and Astronautical Science High energy astrophysics High energy astrophysics: Through observational studies of hot plasma associated with galaxies, hot /warm inter-galactic medium and high energy phenomena in the intra-cluster medium, I try to understand the dynamical and chemical evolution in the universe. With observational study with Suzaku and Hitomi observatory, I promote to realize ultra-high energy resolution spectroscopy in coming missions, Athena, DIOS etc. Also novel detector development like TES and other kind of non-resistive calorimeters is underway.
Tadashi KOSEKI High Energy Accelerator Research Organization High Energy Particle Accelerator Studies on high energy particle accelerators. The main subjects are beam dynamics of linac/synchrotrons and R&D’s on high intensity accelerator components at the Japan Proton Accelerator Research Complex, J-PARC.
Tsutomu MIBE High Energy Accelerator Research Organization Experimental Particle Physics I aim to develop a firm experimental basis of the physics beyond the standard model by using precision measurement on physical quantities related with spin. My approach towards this goal is to look for signals in quantum loops. This approach has been powerful to either find a signature or constrain new models in the past, and now becomes one of frontiers in the field of experimental particle physics. My current research is the measurement of anomalous magnetic moment and electric dipole moment of muon at J-PARC. This includes the world-first realization of muon cooling, acceleration, and particle tracking detector with super-high alignment precision.
* # Osamu MORIMATSU High Energy Accelerator Research Organization theoretical hadron physics We study the properties of hadrons, the interaction of hadrons and the properties of the nuclear matter in the vacuum and at finite temperature and/or finite density based on QCD and its effective theory, aiming at clarifying the nature of the strongly interacting systems.
Kyoichiro OZAWA High Energy Accelerator Research Organization High Energy Nuclear Experiment Experimental study of non-perturbative QCD: 1) Study of quark-gluon-plasma and hadronic matter under high-temperature and high density condition at Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. 2) Study of mechanism of hadronic mass generation. I’m going to perform an experiment at J-PARC to study the mechanism of hadronic mass and interaction with “QCD vacuum”. In addition, R&D for the new detector at J-PARC is on-going.
Naohito SAITO High Energy Accelerator Research Organization Experimental Particle-Nuclear Physics Spin as a tool to elucidate "origin of matter" and the symmetries in space-time
We are studying the origin of matter as well as the symmetries in the space-time using "spin" of an elementary particle as a probe. We are starting the construction of new experiment to measure dipole moments of the muon with super-precision by creating a ultra-slow muon beam at J-PARC. The measurement aims a stringent test of the standard model as well we a search for CP violation in the lepton sector.
* # Izumi TSUTSUI High Energy Accelerator Research Organization Quantum Field Theory and Quantum Mechanics Our group investigates the foundations of quantum mechanics and the nonperturbative aspects of quantum field theory. Recent research topics are: 1) Foundations of Quantum Mechanics * Quantum measurement (Weak Value and Weak Measurement) * Entanglement and quantum correlations in particle physics 2) Gauge Field Theory and Topology * Quantization of systems on topologically nontrivial spaces * Physics of nonperturbative field configurations such as topological solitons
Yutaka USHIRODA High Energy Accelerator Research Organization Elementary Particle Physics Experiment The main subject of my research is to search for New Physics beyond the Standard Model and to study the origin of CP violation. These studies are possible by precision measurements of decay processes of B meson, D meson and tau lepton produced in the world highest luminosity collisions of electron and positron by KEKB accelerator and up-coming SuperKEKB accelerator at KEK in Tsukuba. Also engaged in are practical researches in order to improve quality of data not limited to the Belle II detector, but also in the boundary region of machine and detector, which are unique at the host laboratory.
Takumi DOI The Institute of Physical and Chemical Research Nuclear Theory Nuclei and hadrons are basic constituents of matter. Then, how are nuclei and hadrons formed from elementary particles, quarks and gluons? Aiming at elucidation from the theory of "strong interaction", quantum chromodynamics (QCD), we conduct theoretical research mainly by numerical simulations using supercomputers.
* Kenichi ISHIKAWA School of Engineering theoretical attosecond science We theoretically study how atoms and molecules behave in an intense ultrashort laser field, using ab-initio simulations (first-principles simulations, first-principle simulations) based on quantum mechanics. Our particular interests include: - non-perturbative nonlinear processes such as high-harmonic generation and tunneling ionization - attosecond multielectron dynamics in atoms and molecules
* # Kosuke YOSHIOKA School of Engineering
Sosuke ITO Universal Biology Institute Non-equilbrium statistical physics, Biophysics We theoretically study non-equilibrium statistical physics to understand biological information processing. Especially, we study stochastic thermodynamics, thermodynamics of information, information geometry, and biological signal transduction.
Takuro IDEGUCHI Institute for Photon Science and Technology Optical science We study optical science with advanced lasers. Currently, we are focusing on developing ultrafast spectroscopy and microscopy based on ultrashort pulse lasers including optical frequency combs. These techniques are to be powerful tools not only for physics but also for chemistry, biology, medicine, pharmacy and material science. Moreover, we aim at creating interdisciplinary or multidisciplinary science by combining optics with nanotechnology or microfluidics.
Kuniaki KONISHI Institute for Photon Science and Technology Laser, Optical science We are searching for new physical phenomena caused by the interaction between light and nano- and micro-scale artificial structures fabricated by state-of-the-art microfabrication technologies, and applying them to optical control technologies. Laser processing technology itself is also an object of our research. We are exploring the science of laser processing and also developing new methods for fabricating micro three-dimensional structures using ultrashort laser pulses. For these purposes, we make full use of advanced spectroscopic techniques such as laser nonlinear spectroscopy and terahertz spectroscopy, as well as micro-nano processing and evaluation techniques.
# Norikatsu MIO Institute for Photon Science and Technology Applications of lasers Seeking applications of lasers: gravitatinal wave detection, interferometory, laser processing
Satoshi MURAKAWA Cryogenic Research Center Low temperature physics, quantum liquid and solid
Ryo SHIMANO Cryogenic Research Center Optical properties of condensed matter Our main research interests are focused on the creation and manipulation of many body quantum systems with optical/terahertz pulses. The research subjects include: realization of low temperature quantum degenerate phases such as excitonic insulator (e-h BCS) in photoexcited semiconductors, optical control of superconductivity, study of collective excitations in correlated electron systems, and novel optical phenomena related to the topological phase in condensed matter.
Simeon HELLERMAN Kavli Institute for the Physics and Mathematics of the Universe Theoretical Physics (String Theory) I study the dynamics of gravity in situations where the short-distance structure of space-time becomes important, for example, in the early Universe. As a tool, I use string theory, which is the unique dynamical system incorporating both the existence of gravity and the uncertainty principle of quantum mechanics. My recent work has mapped out the various different phases of string theory and the transitions the theory can make from one phase to another, in a cosmological environment. These phase transitions alter several features of the theory dramatically. For instance, the number of dimensions of the space-time can change, or the transition may restore a highly stable type of order known as supersymmetry, or else the character of the string dynamics may change altogether.
Yoshimasa HIDAKA High Energy Accelerator Research Organization We theoretically study the physics of hadrons under extreme conditions such as high temperatures, high densities, and strong magnetic fields, using quantum chromodynamics (QCD), which is the fundamental theory of strong interactions. In particular, we use analytical and numerical methods to study the big problem in hadron physics, namely, the properties of hadrons in nonequilibrium and at high density. We also study nonperturbative aspects of various quantum and classical systems using symmetry and topology.
Takeo HIGUCHI Kavli Institute for the Physics and Mathematics of the Universe Experimental Particle Physics In quest of new physics beyond the Standard Model of particle physics that can account for yet-unraveled mysteries in the Universe like dark matter, we are working on a high-energy accelerator experiment Belle II operated in Tsukuba, Japan. Of several research topics available in Belle II, we are attracted to and concentrating on precise measurement of the sides and interior angles of the Unitarity Triangle formed by the Quark-Mixing matrix and detection of the new physics by comparing the measurement with the Standard Model prediction. We have been and will be working on the vertex detector and data acquisition system for Belle II as well.
Kiwamu IZUMI The Institute of Space and Astronautical Science
Kentaro HORI Kavli Institute for the Physics and Mathematics of the Universe particle theory, string theory My research is centered on discovery, understanding and application of duality in quantum field theory such as electric-magnetic duality and mirror symmetry; structure and properties of branes and orientifolds in superstring theory. It is sometimes developed through interaction with mathematics.
Kai MARTENS Kavli Institute for the Physics and Mathematics of the Universe Particle Physics 1. Dark Matter direct detection with the XENON experiment (LNGS, Italy) 2. Astrophysical neutrinos with Super-Kamiokande at the Kamioka Observatory, Gifu-ken
Shigeki MATSUMOTO Kavli Institute for the Physics and Mathematics of the Universe Particle phenomenology I am so far studying dark matter (DM) in particle physics; proposing interesting DM candidates, finding new mechanisms on DM processes, suggesting experimental methods to test the candidates, and contributing to DM search projects by showing the range of DM mass and interactions, through various international and interdisciplinary collaborations with high-energy experimentalists, cosmologists, astronomers, and even chemists.
Tomotake MATSUMURA Kavli Institute for the Physics and Mathematics of the Universe Observational/experimental Cosmology We study the physics of early universe using the measurement of cosmic microwave background (CMB) polarization. The theory of cosmic inflation can be tested by measuring the B-mode pattern in the CMB polarization experimentally. We are active member of LiteBIRD, the post ESA Planck satellite, to measure the CMB B-mode polarization. We develop observational hardware (polarization modulator), study systematics effects, develop new calibration strategy and prepare for the data analysis. We also participate POLARBEAR/Simons Array, and PILOT in development and characterization of hardware, operation, calibration and data analysis.
Hitoshi MURAYAMA Kavli Institute for the Physics and Mathematics of the Universe theoretical particle physics, early cosmology Supersymmetry Phenomenology, Particle Cosmology, Quantum Field Theory, Physics at e+ e- Linear Collider, Collider Physics, Neutrino Physics
* # Yuji TACHIKAWA Kavli Institute for the Physics and Mathematics of the Universe Quantum field theory and string theory I mainly study quantum field theory (QFT), which governs the physics of elementary particles. QFT is especially interesting in the strongly-coupled regime, and is analyzable with just pencil, paper and a bit of computing power if we further assume the supersymmetry, a symmetry exchanging fermions and bosons. Supersymmetric quantum field theory is best studied by embedding it in string theory, which is another main subject of my study. An interesting aspect of this line of research is that many modern mathematical concepts somehow appear naturally.
Masahiro TAKADA Kavli Institute for the Physics and Mathematics of the Universe Cosmology Kavli IPMU is one of the leading institutions of the unprecedented massive galaxy survey carried with the 8.2m Subaru Telescope ( My main research interest is exploring “experimental” high-precision cosmology with the Subaru data: 1) Exploring the nature of dark matter and dark energy with high-precision measurement of weak gravitational lensing due to cosmic structures 2) Constraining the mass scale of neutrinos from measurements of galaxy clustering statistics 3) To test theory of gravity at cosmological distance scales as well as test theory of cosmic structure formation
* # Tadayuki TAKAHASHI Kavli Institute for the Physics and Mathematics of the Universe High Energy Astrophysics (1) Experimental and observational high-energy astro-particle physics. In particular, study of X-ray and gamma-ray emission from blazars and SNRs. (2) Hard X-ray and Gamma-ray Imaging detector for high energy space astrophysics.
Mark VAGINS Kavli Institute for the Physics and Mathematics of the Universe Experimental Physics (Astroparticle Physics) My research is focused on developing new methods of observing neutrinos, both through the enhancement of existing detectors like Super-Kamiokande (Super-K) and via the design and construction of future facilities like Hyper-Kamiokande. One of my main goals is to measure, for the first time, the diffuse supernova neutrino background (DSNB), often called the “relic” supernova neutrinos. Adding water-soluble gadolinium to Super-K - an idea I co-invented - should allow us to detect these relic neutrinos without having to build an all-new experiment. Enhancing Super-K in this manner will also make possible other new physics, including high-statistics reactor antineutrino oscillation studies, as well as improve studies of neutrino oscillations and proton decay searches.
Taizan WATARI Kavli Institute for the Physics and Mathematics of the Universe Thoretical Particle Physics Institute for the Physics and Mathematics of the Universe (IPMU) welcomes graduate students. Visit this page for more information. My research interests in recent years include string duality, mathematics seen in the language of string theory, and physics applications of string theory (to hadron scattering, grand unification and early universe). To see whether I am ready to host one more PhD student next year, visit my web page
Yuto ASHIDA Institute for Physics of Intelligence Condensed matter theory, Quantum physics Theoretical studies at the intersection of quantum many-body physics and quantum optics.
Yoshiyuki KABASHIMA Institute for Physics of Intelligence statistical mechanics, information theory Yoshiyuki Kabashima is working in a cross-disciplinary field between statistical physics and information sciences. His research topics include error-correcting codes, cryptography, CDMA multi-user detection, data compression, compressive sensing, random matrix, machine learning, spin glasses.
Kensuke KOBAYASHI Institute for Physics of Intelligence nanophysics Recent progress in nanotechnology enables us to directly address quantum behavior of electrons in nano-devices made of metal or semiconductor. The advantage of this research field, which is called "mesoscopic physics" or "nanophysics", lies in the various controllability and the versatile degrees of freedom in the device design. We explore this field to understand, predict, and control various novel quantum, many-body, and nonequilibrium effects in nano-devices in terms of the dynamical aspects of electron behavior.
Professors with 「*」 do not take graduate students.
Professors with 「#」 do not take master's graduate students.
Professors with 「!」 has spesial report.