265 citations · 3k across the 128 of their papers we have counts for
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Energy Transport in the Integrable System in Contact with Various Types of Phonon Reservoirs
K. Saito, S. Takesue, S. Miyashita
We study how energy transport in an integrable system is affected by the spectral densities of heat reservoirs. The model investigated here is the quantum harmonic chain whose both…
Non-Adiabatic Transition in Spin-Boson Model and Generalization of the Landau-Zener Formula
Hiroto Kobayashi, Naomichi Hatano, Seiji Miyashita
Non-adiabatic transitions are studied in a spin-boson model with multiple scattering points. In order to generalize the Landau-Zener formula, which describes the case of a single s…
Switching dynamics between metastable ordered magnetic state and nonmagnetic ground state - A possible mechanism for photoinduced ferromagnetism -
Masamichi Nishino, Kizashi Yamaguchi, Seiji Miyashita
By studying the dynamics of the metastable magnetization of a statistical mechanical model we propose a switching mechanism of photoinduced magnetization. The equilibrium and noneq…
Griffiths-McCoy singularities in the transverse field Ising model on the randomly diluted square lattice
T. Ikegami, S. Miyashita, H. Rieger
The site-diluted transverse field Ising model in two dimensions is studied with Quantum-Monte-Carlo simulations. Its phase diagram is determined in the transverse field (Gamma) and…