FieldsStatistical physics and thermodynamics

A Neural Thermometer for Predicting Phase Transitions of Unknown Systems
2024911
A novel convolutional neural network predicts phase transition temperatures from spin configurations without prior information about order parameters, paving the way for the discovery of new materials in condensed matter physics.
Measurement, instrumentation, and techniques
Statistical physics and thermodynamics

Solving a Stochastic Differential Equation is Solving a MeanField Quantum Spin System
2024516
The replica method maps matrixvalued geometric Brownian motion to a meanfield quantum spin system. This correspondence makes it possible to obtain an exact solution for matrixvalued geometric Brownian motion.
Magnetic properties in condensed matter
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Statistical physics and thermodynamics

Thermodynamic Property of a CMOS Device beyond Landauer Limit
2024123
Focusing on a CMOS NAND GATE operating in a subthreshold region, the thermodynamic cost of computation was analyzed in relation to input/output voltages surpassing the Landauer limit.
Crossdisciplinary physics and related areas of science and technology
Electronic transport in condensed matter
Statistical physics and thermodynamics

PICKUPExploring Recent Advances in the Physics of Biofluid Locomotion
2023128
This Special Topics Edition of the JPSJ describes the latest advances in the field of biofluid locomotion, shedding light on the underlying physics behind the movement of organisms that swim and fly.
Crossdisciplinary physics and related areas of science and technology
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Measurement, instrumentation, and techniques
Statistical physics and thermodynamics
Structure and mechanical and thermal properties in condensed matter

Discovering a Local Fluctuation Theorem with Machine Learning
20231020
A groundbreaking study reveals a new timelocal fluctuation theorem using machine learning, revolutionizing our understanding of deterministic nonequilibrium steady state systems.
Fundamental Theory of Condensed Matter Physics, Statistical Mechanics, Fluid Dynamics,
Measurement, instrumentation, and techniques
Statistical physics and thermodynamics

NetPattern of Muskmelon Rind Favors a Common Mathematical Law
2023112
The surface of muskmelon is covered with a fine meshlike netpattern. The geometric features of the fine mesh appear unique for each individual, but hide an unexpected mathematical rule.
Crossdisciplinary physics and related areas of science and technology
Statistical physics and thermodynamics

PICKUPTensor Networks Across Physics
202267
Researchers from Japan provide the first comprehensive review of the historical development of tensor networks from a statistical mechanics viewpoint, with a focus on its theoretical background.
Magnetic properties in condensed matter
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Statistical physics and thermodynamics

Violation of FluctuationDissipation Theorem Results in Robustness of Fluctuation Against Localization
2022323
We study equilibrium current fluctuations in systems without timereversal symmetry, violating the fluctuationdissipation theorem. Notably, the offdiagonal fluctuation is insensitive to system imperfections in contrast to other fluctuations and conductivity.
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter
Statistical physics and thermodynamics

Economic Irreversibility: The Universal Guiding Principle of Infection Control
202231
It is preferable to avoid lockdowns, as lockdowns at seriously spread phases are very expensive. It would be economically better to utilize less intense countermeasures as early as possible to avoid lockdowns in later phases.
Crossdisciplinary physics and related areas of science and technology
Statistical physics and thermodynamics

How Good is the TransitionState Theory?
20211130
For the first time, the main assumption of the transitionstate theory for the decay of complex quantum systems across a potential barrier was realized using a microscopic manybody Hamiltonian.
Nuclear physics
Statistical physics and thermodynamics

Electric Quadrupole Orders in fElectron Systems on the fcc Lattice
2021517
We theoretically showed that electric quadrupoles in some heavy fermion materials exhibit a very rich phase diagram including unique partiallyordered phases stabilized by an interaction specific to these systems.
Dielectric, optical, and other properties in condensed matter
Magnetic properties in condensed matter
Statistical physics and thermodynamics

Electronic Nematic Ordering Driven by Atomicscale Multipoles
2021513
Theoretical investigations have unearthed a plethora of electronic nematic orderings driven by the spatial distribution of atomicscale electric quadrupoles.Dielectric, optical, and other properties in condensed matter
Magnetic properties in condensed matter
Statistical physics and thermodynamics

Phase Transition and Its Universality Class for a Quantum Spin Chain
2021329
We numerically diagonalize the DimerTrimer (DT) model Hamiltonian around the SU(3) symmetric point. As a result, we discover the phase transition at this point which belongs to the BerezinskiiKosterlitzThouless (BKT)like universality class.
Magnetic properties in condensed matter
Statistical physics and thermodynamics

Splitting Walls: Interplay of Different Orders in Multiferroic Materials
2021329
We theoretically showed an intrinsic splitting instability of composite domain walls in multiferroic materials under field drive. This instability is a direct result of the coexistence of multiple orders in the system.
Magnetic properties in condensed matter
Statistical physics and thermodynamics

Reducing the Number of Tests Using Bayesian Inference to Identify Infected Patients in Group Testing
2021322
Group testing is a method of identifying infected patients by performing tests on a pool of specimens. Bayesian inference and a corresponding belief propagation (BP) algorithm are introduced to identify the infected patients in group testing.
Crossdisciplinary physics and related areas of science and technology
Statistical physics and thermodynamics

How is Brownian Motion Affected by a Fluctuating Random Surface?
2021315
A researcher has developed a new theory to describe the Brownian motion of a small object that is confined in a fluctuating random surface.
Statistical physics and thermodynamics
Structure and mechanical and thermal properties in condensed matter

Using Analogy to Understand Localization in Quantum Annealing
2021315
Localization may cause the inefficiency of quantum annealing. The constrained quantum annealing of graph coloring provides a new viewpoint to analyze localization phenomena in quantum annealing.
Statistical physics and thermodynamics

Multiple Superconducting Phases in UTe2: A Complex Analogy to Superfluid Phases of 3He
202133
In quantum liquids, large differences are observed owing to differences in quantum statistics. The physical properties of liquid ^{3}He (Fermion) and ^{4}He (Boson) are considerably different at low temperatures. After the discovery of superconductivity in electron (i.e., Fermion) systems, a similar pairing ordered state was expected for ^{3}He. Remarkably, the observed ordered state of ^{3}He was more surprising than expected, multiple superfluid phases in the T–P phase diagram. The origin of the multiple phases was attributed to ferromagnetic interactions in the pwave symmetry state.
Measurement, instrumentation, and techniques
Statistical physics and thermodynamics

What Dictates Nonlinear Behavior in Strongly Correlated Insulators?
202133
The nonlinear conduction (the deviation from Ohm's law) has been discovered universally in various correlated materials. This may be explained by the percolation conduction in disordered materials.Electronic transport in condensed matter
Statistical physics and thermodynamics