Relaxation dynamics in double-spin systems
Mesoscale and Nanoscale Physics
2020-02-18 v2 Quantum Physics
Abstract
We consider the relaxation dynamics of two spins coupled to a common bosonic bath. The time evolution is simulated by a generalized master equation derived within a real-time diagrammatic approach. Interference effects due to the coherent coupling to the common bath give rise to characteristic features in the relaxation dynamics after a quench or during a periodic external driving. In particular, we find that the long-time behavior during periodic driving depends sensitively on the initial state as well as on system parameters such as coupling asymmetries. When coupled to more than a single reservoir, the interference effects can lead to a cooling mechanism for one of the bosonic reservoirs.
Cite
@article{arxiv.1910.07338,
title = {Relaxation dynamics in double-spin systems},
author = {Philipp Stegmann and Jürgen König and Björn Sothmann},
journal= {arXiv preprint arXiv:1910.07338},
year = {2020}
}
Comments
8 pages, 5 figures