JPS Hot Topics

Single-crystal NaAlSi Shows Unconventional Superconductivity

Interesting normal and superconducting states of NaAlSi, a topological nodal line semimetal, were revealed by the measurements using the single crystals grown by the self-flux method.

Superconductivity

Phase Transition and Its Universality Class for a Quantum Spin Chain

We numerically diagonalize the Dimer-Trimer (DT) model Hamiltonian around the SU(3) symmetric point. As a result, we discover the phase transition at this point which belongs to the Berezinskii-Kosterlitz-Thouless (BKT)-like universality class.

Statistical physics and thermodynamics

Magnetic properties in condensed matter

Splitting Walls: Interplay of Different Orders in Multiferroic Materials

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

Random Numbers Can Help Solve Difficult Problems in Many-body Physics

Theorists review a random state vector-based description of quantum many-body systems which helps greatly reduce the computational burden involved in their numerical simulations, opening doors to applications in quantum computing.

Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, comupational modeling

Electronic transport in condensed matter

Magnetic properties in condensed matter

A New Approach to Solving Periodic Differential Systems

Mathematicians and physicists are well acquainted with second-order ordinary differential equations (ODE), the most prominent of them being the class of equations that govern oscillatory motion.

Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, comupational modeling

Hybrid Quantum–Classical Algorithms: At the Verge of Useful Quantum Computing

Scientists discuss the recent progress in algorithms that have enabled hybrid quantum–classical computers, which has brought the quest to realize useful quantum computing much closer to its finish line.

Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, comupational modeling

Cross-disciplinary physics and related areas of science and technology

Quantum Phase Transition in Spin Dimer Systems

A magnetic moment fluctuates in both longitudinal and transverse directions. The total moment sum rule is a conservation law that can help us resolve data of neutron scattering into the two components.

Magnetic properties in condensed matter

No Mass Gap Phase Transition in Novel Massless Dirac Fermion Material

Using an organic massless Dirac fermion system, we found that massless Dirac fermions undergo a quantum phase transition without creating any mass gap even in the strong coupling regime.

Electron states in condensed matter

Electronic transport in condensed matter

Of Spins and Atoms: Combining Rotations to Obtain Directed Motion

The coupling between surface acoustic waves and spin waves is shown to depend strongly on the angle between the acoustic wavevector and magnetization. For a particular angle, it completely vanishes in one direction, which enables a unidirectional generation of surface acoustic waves by a ferromagnetic resonance.

Magnetic properties in condensed matter

Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics

Reducing the Number of Tests Using Bayesian Inference to Identify Infected Patients in Group Testing

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.

Statistical physics and thermodynamics

Cross-disciplinary physics and related areas of science and technology