Nonequilibrium steadystates of memoryless quantum collision models
Abstract
We investigate the steady state properties arising from the open system dynamics described by a memoryless (Markovian) quantum collision model, corresponding to a master equation in the ultrastrong coupling regime. By carefully assessing the work cost of switching on and off the systemenvironment interaction, we show that only a coupling Hamiltonian in the energypreserving form drives the system to thermal equilibrium, while any other interaction leads to nonequilibrium steady states that are supported by steadystate currents. These currents provide a neat exemplification of the housekeeping work and heat. Furthermore, we characterize the specific form of systemenvironment interaction that drives the system to a steadystate exhibiting coherence in the energy eigenbasis, thus, giving rise to families of states that are nonpassive.
 Publication:

Physics Letters A
 Pub Date:
 August 2020
 DOI:
 10.1016/j.physleta.2020.126576
 arXiv:
 arXiv:2001.01723
 Bibcode:
 2020PhLA..38426576G
 Keywords:

 Open quantum systems;
 Quantum thermodynamics;
 Collision models;
 Nonequilibrium systems;
 Quantum Physics;
 Condensed Matter  Statistical Mechanics
 EPrint:
 11 pages, 3 figures. Substantially revised and expanded in v2