Abstract

The effects of a non-Markovian reservoir on the performance of an ideal quantum Otto heat engine are investigated. By coupling the cavity to a hot non-Markovian reservoir, the cavity can be enabled to reach a steady state corresponding to an effective temperature higher than the temperature of the hot reservoir. This observation shows that the quantum Otto heat engine can transport heat from a cold reservoir to a hot reservoir with positive net work output under certain conditions. Also, when the temperature of the hot reservoir lies in certain regions, the efficiency of the quantum Otto heat engine can exceed the efficiency of classical Carnot heat engine.

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