33 citations · 68 across the 7 of their papers we have counts for
3 papers · 1 filter
Nonadiabaticity in spin pumping under relaxation
Kazunari Hashimoto, Gen Tatara, Chikako Uchiyama
Using a minimum model consisting of a magnetic quantum dot and an electron lead, we investigate spin pumping by its precessing magnetization. Focusing on the "adiabaticity", which…
Microscopic Description of Quantum Lorentz Gas by Complex Spectral Representation of the Liouville-von Neumann Equation: A Limitation of the Boltzmann Approximation
Kazunari Hashimoto, Kazuki Kanki, Satoshi Tanaka +1
Irreversible processes of one-dimensional quantum perfect Lorentz gas is studied on the basis of the fundamental laws of physics in terms of the complex spectral analysis associate…
Non-divergent representation of non-Hermitian operator near the exceptional point with application to a quantum Lorentz gas
Kazunari Hashimoto, Kazuki Kanki, Hisao Hayakawa +1
We propose a non-singular representation for a non-Hermitian operator even if the parameter space contains exceptional points (EPs), at which the operator cannot be diagonalized an…