Nonequilibrium energy transport in driven-dissipative quantum systems

TL;DR

This paper investigates nonequilibrium energy transport in driven-dissipative quantum systems using a driven quantum master equation, confirming its validity and highlighting how additional driving phases influence energy exchange and current enhancement.

Contribution

It demonstrates the effectiveness of the driven quantum master equation in modeling energy transport, comparing it with Floquet approaches, and explores the impact of driving phases on energy currents.

Findings

Driven quantum master equation accurately models energy flow in quantum systems.

Additional driving phases significantly modify microscopic energy exchange processes.

Steady-state energy currents are greatly enhanced near resonant regimes.

Abstract

Nonequilibrium energy transport serves as one of fundamental problems in quantum thermodynamics and quantum technologies. Driven quantum master equation in the dressed picture provides an efficient way of investigating nonequilibrium energy flow in general driven-dissipative quantum systems, where the systems are simultaneously driven by the finite thermodynamic bias and coherent driving field. The validity and general applicability of driven quantum master equation is confirmed by comparing with Floquet master equation, by analyzing energy currents in generic spin and boson models. The additional driving phase reserved in system-reservoir interactions, will apparently modify microscopic energy exchange processes. The steady-state energy currents are dramatically enhanced, in particular near the resonant regimes. In contrast, the traditional dressed master equation yields distinct behaviors of the energy currents. We hope that the driven quantum master equation may provide an efficient utility for the control of quantum transport and thermodynamic performances in driven-dissipative nanodevices.