Energy exchange in driven open quantum systems at strong coupling

TL;DR

This paper investigates energy transfer in driven open quantum systems under strong coupling, deriving exact expressions for energy dissipation and revealing that interaction can dominate dissipation, with results showing coherence and resonance effects.

Contribution

It introduces an influence functional approach to exactly analyze energy exchange in strongly coupled driven quantum systems, highlighting the role of interaction as a major dissipation channel.

Findings

Interaction can be the primary source of energy dissipation at strong coupling.

Energy flows exhibit driving-induced coherence effects.

Quantum stochastic resonances are observed in energy transfer.

Abstract

The time-dependent energy transfer in a driven quantum system strongly coupled to a heat bath is studied within an influence functional approach. Exact formal expressions for the statistics of energy dissipation into the different channels are derived. The general method is applied to the driven dissipative two-state system. It is shown that the energy flows obey a balance relation, and that, for strong coupling, the interaction may constitute the major dissipative channel. Results in analytic form are presented for a particular value of strong Ohmic dissipation. The energy flows show interesting behaviors including driving-induced coherences and quantum stochastic resonances.