Non-Markovian dynamics of quantum systems. II. Decay rate, capture, and pure states.
On the basis of a master equation for the reduced density matrix of open quantum systems, we study the influence of time-dependent friction and diffusion coefficients on the decay rate from a potential well and the capture probability into a potential well. Taking into account the mixed diffusion coefficient Dqp, the quasistationary decay rates are compared with the analytically derived Kramers-type formulas for different temperatures and frictions. The diffusion coefficients supplying the purity of states are derived for a non-Markovian dynamics.
Palchikov
Yu V
YV
Joint Institute for Nuclear Research, 141980 Dubna, Russia.
Kanokov
Z
Z
Adamian
G G
GG
Antonenko
N V
NV
Scheid
W
W