日本物理学会誌及びJournal of the Physical Society of Japanの月刊について

The magnetic properties of many magnetic materials can be controlled by external stimuli. The principal focus here is on the thermal, photochemical, electrochemical, and chemical control of phase transitions that involve changes in magnetization. The molecular compounds described herein range from metal complexes, through pure organic compounds to composite materials. Most of the Review is devoted to the properties of valence-tautomeric compounds, molecular magnets, and spin-crossover complexes, which could find future application in memory devices or optical switches.

Control of magnetic properties through external stimuli.

Magnetocaloric effect: From materials research to refrigeration devices

The simple act of slowly varying the parameters of a quantum system so that it remains always in its ground state is extremely rich from an information processing point of view. For an ideal, closed system, this adiabatic evolution is equivalent to full quantum computation, and it is convenient for establishing quantum algorithms for optimization. This review presents adiabatic quantum algorithms, proves the closed-system equivalence of the adiabatic and circuit models of quantum computation, reviews the placement of adiabatic quantum computation in the more general classification of computational complexity theory, and discusses the case of ``stoquastic'' quantum evolutions.

Adiabatic quantum computation

Sarcopenia

Optical study of the metal-semiconductor transition in BaPb1-xBixO3.

Ultrafast optical switching from an ionic ( $I$) to a neutral ( $N$) state in TTF-CA was observed in femtosecond reflection spectroscopy. Charge transfer excitation in the $I$ phase produces $N$ donor ( ${D}^{0}$) acceptor ( ${A}^{0}$) strings within 2 ps. These initial $N$ states decay with a lifetime of 300 ps at 4 K, but rather multiply leading to macroscopic $I\ensuremath{-}N$ conversion within 20 ps at 77 K just below the $N\ensuremath{-}I$ transition temperature ${T}_{\mathrm{NI}}$. Near ${T}_{\mathrm{NI}}$, we also found the evidence for the coherent motion of the macroscopic $N\ensuremath{-}I$ domain boundary with a period of 85 ps.

Ultrafast optical switching from an ionic to a neutral state in tetrathiafulvalene-p-chloranil (TTF-CA) observed in femtosecond reflection spectroscopy.

Photoinduced phase transition in tetrathiafulvalene- p -chloranil observed in femtosecond reflection spectroscopy

An online advertisement optimization, which can be represented by a combinatorial optimization problem is performed using D-Wave 2000Q, a quantum annealing machine. To optimize the online advertise...

Application of Ising Machines and a Software Development for Ising Machines

The authors provide an algorithm to incorporate quantum annealing into automated materials discovery. Their scheme can be used to design complex structures of wavelength selective radiators showing much better agreement with the thermal atmospheric transparency window.

https://link.aps.org/pdf/10.1103/PhysRevResearch.2.013319

Shu Tanaka

Papers

Optical study of the metal-semiconductor transition in BaPb1-xBixO3.

Ultrafast optical switching from an ionic to a neutral state in tetrathiafulvalene-p-chloranil (TTF-CA) observed in femtosecond reflection spectroscopy.

Photoinduced phase transition in tetrathiafulvalene- p -chloranil observed in femtosecond reflection spectroscopy

Application of Ising Machines and a Software Development for Ising Machines

Designing metamaterials with quantum annealing and factorization machines