Theoretical Particle, Subatomic, Nuclear, and AstroPhysics
Theory of Elementary Particles
Hiroshi Suzuki, Professor
Koji Tsumura, Associate Professor
Hajime Otsuka, Assistant Professor
Yoshiki Uchida, Assistant Professor
Theoretical study of elementary particule physics (quantum field theory, quantum anomaly, lattice gauge theory, exact renormalization group, beyond the standard model, model building, phenomenology and cosmology, superstring theory, unified theory, Calabi-Yau compactification, machine learning) Read more
Theory of Subatomic Physics and Astrophysics
Koji Harada†, Professor
Yutaka Ookouchi†, Associate Professor
Kentaro Kojima†, Associate Professor
Ken'ichiro Nakazato†, Associate Professor
Shuichiro Tao†, Assistant Professor
† Faculty of Arts and Science
Various aspects of theoretical subatomic physics and astrophysics (string theory, quantum field theory, unified theory, hadron physics, gravitational wave, supernova physics). Read more
Theoretical Nuclear Physics
Kazuyuki Ogata, Professor
Shoya Ogawa, Assistant Professor
Our group is making advanced research work on nuclear physics from theoretical point of view. Here the nucleus is a finite quantum-mechanical many-body system, which is composed of two kinds of elementary particles, protons and neutrons. We are also working on hadron physics, where the quarks and gluons are basic ingredients and they are govern by the fundamental theory of strong interaction, quantum chromodynamics (QCD). Read more
Theoretical Astrophysics
Kazuhiro Yamamoto, Professor
Sugumi Kanno, Associate Professor
Yui KUramochi, Assistant Professor
Our group studies topics in cosmology, gravitation, and astrophysics. Current research topics are as follows:
Testing gravity and exploring the origin of the accelerated expansion of the Universe using observational cosmology
Inflationary universe and the evolution of the cosmic structures
Application of quantum information sciences to cosmology and gravity, quantum field theory in curved spacetime
Our group is conducting experimental research projects using state-of-the-art accelerators for understanding of the fundamental law of the universe. Our current projects are as follows:
The ATLAS experiment at the LHC
The International Linear Collider project
Particle physics experiments using highly intense muon beams at J-PARC
Fundamental physics experiments using low energy neutrons at J-PARC
Our group studies nucleon and hadron many body systems experimentally. Accelerators in Kyushu University and in RIKEN and RCNP are used. Current research topics are as follows:
Search for new superheavy element. Spectroscopic and chemical studies of the nuclei of the heaviest elements.
Spin-isospin responses and nuclear medium effects in stable and unstable nuclei.
Spectroscopy of neutron-rich or proton-rich unstable nuclei.
Low-energy nuclear physics. Technical developments using Kyushu Tandem accelerator.
Condensed Matter Theory and Statistical and Mathematical Physics
Condensed Matter Theory
Jun-ichi Fukuda, Professor
Jun Matsui, Lecturer
Research topics in our group cover various phenomena in non-equilibrium systems and complex systems. Our focus is on theoretical and computational physics of soft condensed matter, and current research subjects include:
Self-organized structures and dynamics of liquid crystals
Optical properties of ordered structures in soft matter
Our group theoretically studies geometric quantum phenomena in solid-state condensed matter systems, such as quantum Hall effect, topological insulators / superconductors, Dirac / Weyl semimetals.
Mathematical Physics
Osamu Narikiyo, Associate Professor
Our group studies mathematical aspects of quantum systems with infinitely many degrees of freedom. Current research topics are as follows:
Gauge theories without ghosts
Long-range force or infrared divergence in QED
Emergence of classical degrees of freedom
Categorical quantum field theory in curved space-time
Our group studies magnetic properties of metallic materials (alloys and compounds) from both fundamental and applied aspects of physics. Current research topics are as follows:
Magnetocaloric effect of first-order magnetic transition systems.
High-field transport properties of itinerant electron metamagnetism.
Valence instability of 4f electron systems.
Exotic phase transitions of superconducting systems.
Terahertz time-domain spectroscopy on superconductors and development of spectroscopic techniques.
Solid State Physics
Takashi Kimura, Professor
Kohei Ohnishi, Assistant Professor
Kazumasa Yamada, Assistant Professor
Takeshi Arai, Assistant Professor
We are interested in electron-transport phenomena in nano-scale systems composed of different types of functional materials such as ferro- and antiferro-magnetic materials, superconductor, normal metal and insulator. Especially, we focus significantly on the influence of electron spin in the transports, so called spin-dependent transports. Moreover, understanding and manipulating the dynamical motions of spin is also important research subject. The specific example of the research subject is as follows.
Understanding electrically and thermally driven spin-current transports
Interplay between spin-polarized electron and cooper pair
Nonlinear motion of nano-scale spin dynamics in patterned ferromagnetic film
Development of novel nanoelectric devices such as spin memristor and spin filter
We are the experimental research group that investigates Non-equilibrium Physics of “soft materials” (e.g. colloids, polymers and liquid crystals). Much of the diversity in nature depends on the complex hierarchical ordering of these soft materials and their slow cooperative dynamics, that are the focus of our study. Dynamic self-assembly of soft materials, for instance, creates exquisite structures in living organisms that are under constant activation by their own metabolism. We investigate such nonequilibrium processes that obviously do not obey the statistics of thermodynamic equilibrium, by developing novel state-of-the-art experimental and theoretical techniques.Read more
Complex Fluids
Yusuke T. Maeda, Associate Professor
Lab. of complex fluids studies non-equilibrium and nonlinear dynamics involved in biological systems from experiment and theoretical approaches. The goal of our laboratory is to bring novel understandings of physics of collective systems far from equilibrium. To answer " what if life?" from physical view points, primary efforts are focused in projects listed below:
Fluid dynamics and transport phenomenon out of equilibrium
Why living organisms consist of soft materials? Complexity and versatility of biological systems arise when soft materials are driven far from equilibrium. We investigate the mechanism from physics perspectives, by measuring "softness" and "non-equilibrium properties" of soft matter.
Exploring non-equilibrium relations in soft biological systems
Microrheology of biological cells and tissues
Violation of Fluctuation-Dissipation and Central Limiting theorems
