Dissipative dynamics in a quantum bistable system: Crossover from weak to strong damping
Statistical Mechanics
2017-09-19 v2
Abstract
The dissipative dynamics of a quantum bistable system coupled to a Ohmic heat bath is investigated beyond the spin-boson approximation. Within the path-integral approach to quantum dissipation, we propose an approximation scheme which exploits the separation of time scales between intra- and interwell (tunneling) dynamics. The resulting generalized master equation for the populations in a space localized basis enables us to investigate a wide range of temperatures and system-environment coupling strengths. A phase diagram in the coupling-temperature space is provided to give a comprehensive account of the different dynamical regimes.
Cite
@article{arxiv.1412.7467,
title = {Dissipative dynamics in a quantum bistable system: Crossover from weak to strong damping},
author = {Luca Magazzù and Davide Valenti and Bernardo Spagnolo and Milena Grifoni},
journal= {arXiv preprint arXiv:1412.7467},
year = {2017}
}
Comments
22 pages, 15 figures; second version closer to the published one