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Statistical Physics and Dynamics Lab
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A theory lab that uses statistical physics to explore the collective behavior arising from many interacting elements.

AboutAbout the lab
Exploring, through theory, the laws that emerge when things come together.
The Statistical Physics and Dynamics Lab aims to understand the laws governing the collective behavior and dynamics of systems made up of many elements.
Covering a wide range of subjects, from quantum and classical many-body systems to fluids, polymers and gels, granular matter and glasses, living systems, and quantum computers, the lab theoretically studies phase transitions, transport phenomena, turbulence, and more.
Using mathematical models and numerical simulations, the lab also works on discovering new phenomena and elucidating their essential mechanisms.
The lab consists of five groups: nonlinear dynamics, fluid physics, phase transition dynamics, Saito, and Kanazawa.
Key terms
- Nonequilibrium
- A state driven strongly from outside and therefore away from a settled (equilibrium) state
- Fluctuations
- Small variations of a quantity around its average in a collection of many particles
- Soft matter
- Materials such as polymers, liquid crystals, and colloids that respond softly to external forces
ResearchResearch themes
The lab conducts wide-ranging research with keywords such as nonlinearity, nonequilibrium, fluctuations, complexity, information, statistical analysis, and estimation. It aims to systematize the laws behind natural phenomena.
*Illustrative imageNonequilibrium fluctuations and emergence
The lab explores how concepts absent from the microscopic description emerge when microscopic elements assemble into a macroscopic system. It analyzes phenomena such as phase coexistence under nonequilibrium conditions using fluctuation theory, extended theories of thermodynamics, and numerical experiments.
*Illustrative imageIrreversible processes and transport
The lab studies the thermodynamics of irreversible processes, the statistical mechanics of transport phenomena, and the propagation of information and thermalization dynamics in quantum systems. Based on the thermodynamics of fluctuating systems, it is also working to sharpen various limits of nonequilibrium thermodynamics.
*Illustrative imageTurbulence and nonlinear flows
Solutions of nonlinear partial differential equations such as the Navier-Stokes equations fluctuate violently in time and space. The lab uses numerical simulations to seek theoretical breakthroughs on such problems.
*Illustrative imagePhase transitions and soft matter
The lab studies the dynamics of phase transitions and phase separation, soft matter such as polymers, liquid crystals, and colloids, and the properties of complex fluids, using theoretical analysis and numerical simulation.
MembersFaculty
- ProfessorShinichi Sasa
- ProfessorKeiji Saito
- Associate ProfessorTakeaki Araki
- Associate ProfessorKiyoshi Kanazawa
- Associate ProfessorDECHANT Andreas
- Assistant ProfessorHikaru Kitamura
- Assistant ProfessorTakeshi Matsumoto
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Phase separation in Kupchan partitioning” Ikramul Hasan Imran / CC BY 4.0 (cropped)
- Nonequilibrium fluctuations and emergence: “Szilard engine schematic” רמוע / CC BY-SA 4.0 (cropped)
- Irreversible processes and transport: “Temperature-dependent-diffusion” MikeRun / CC BY-SA 4.0 (cropped)
- Turbulence and nonlinear flows: “Magnetic turbulence” Giannandrea Inchingolo / CC BY-SA 4.0 (cropped)
- Phase transitions and soft matter: “Bubbles in a Foam” KarlGaff / CC BY 4.0 (cropped)
- Related lab (ACTIVE MATTER LAB): “DNA Origami Triangular” Matthias A. Fenner / CC BY-SA 4.0 (cropped)
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計動力学 (早川 尚男) ): “Angleofrepose” Captain Sprite at English Wikipedia / CC BY-SA 2.5 (cropped)
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