Driving induced coherent quantum energy transport
Abstract
Nonequilibrium energy flows in a driven quantum system coupled to two heat baths are investigated to describe microscopic driven-dissipative processes, based on both a canonical transformation and full counting statistics. The main focus is to understand the interference between the coherent driving and bath induced dissipation. We aim to explore efficient modulation of the quantum energy transport, characterized as transient energy flow, by the Rabi driving and the temperature bias. In particular, steady-state energy flow is divided into three components: temperature bias flow, driving flow, and coherence flow. The driving flow is dominated by the external field driving, and the coherence flow is determined by the interference of two side peaks that are blueshifted and redshifted in Mollow's triplet. The energy flow is mainly contributed by the temperature bias flow at a weak driving limit, and the driving flow is in a strong driving regime. The effects of driving amplitude and temperature bias on the steady-state flow are discussed comprehensively. The results may provide guidance for the efficient control of energy and the information transport in nanodevices driven by an optical field.
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