Quantum power boost in a nonstationary cavity-QED quantum heat engine

TL;DR

This paper demonstrates a quantum power boost in a cavity-QED heat engine achieved through nonstationary modulation of system parameters, with potential experimental realization in circuit QED.

Contribution

It introduces a method to enhance heat engine power using nonstationary regimes in cavity-QED systems, a novel approach not previously explored.

Findings

Quantum power boost observed in nonstationary Jaynes-Cummings and Rabi models.

Power amplification can enhance external driving fields.

Predictions are experimentally testable in circuit QED setups.

Abstract

We show a quantum boost in the output power of a heat engine formed by a two-level system coupled to a single-mode cavity. The key ingredient here is the nonstationary regime achieved when some system parameter (atomic transition frequency, in our case) is subjected to a time-dependent perturbative modulation that is precisely tuned at certain frequencies. We discuss how the extracted power can lead to amplification of the external driving field. Quantum power boost is found both in the nonstationary Jaynes-Cummings and Rabi models, indicating that our predictions can be experimentally tested in circuit quantum electrodynamics setups.