3 papers
cond-mat.mtrl-sci2000
Quantum Dynamics in Nanoscale Magnets in Dissipative Environments
Seiji Miyashita, Keiji Saito, Hiroto Kobayashi +1
In discrete energy structure of nanoscale magnets, nonadiabatic transitions at avoided level crossings lead to fundamental processes of dynamics of magnetizations. The thermal envi…
cond-mat.stat-mech1999
Parity Effect in the Resonant Tunneling
Seiji Miyashita, Keiji Saito, Hiroto Kobayashi
A mechanism of the parity effect in the thermally assisted resonant tunneling is proposed in the view point of nonadiabatic transitions of thermally excited states. In this mechani…
math-ph1999
Comment on ``A simple expression for the terms in the Baker-Campbell-Hausdorff series''
Hiroto Kobayashi
It is pointed out that Reinsch's matrix operation formulation of calculating the Baker-Campbell-Hausdorff series [math-ph/9905012] is equivalent to the straightforward series expan…