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- 摘要
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Jarzynski equality for superconducting optical cavities: An alternative path to determine Helmholtz free energy
摘要： A superconducting cavity model was proposed as a way to experimentally investigate the work performed in a quantum system. We found a simple mathematical relation between the free energy variation and visibility measurement in quantum cavity context. If we consider the difference of Hamiltonian at time t0 and tλ (protocol time) as a quantum work, then the Jarzynski equality is valid and the visibility can be used to determine the work done on the cavity.
关键词： quantum Jarzynski equality,quantum heat,quantum work,cavity quantum electrodynamics
更新于2025-09-23 15:22:29
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An optomechanical heat engine with feedback-controlled in-loop light
摘要： The dissipative properties of an optical cavity can be effectively controlled by placing it in a feedback loop where the light at the cavity output is detected and the corresponding signal is used to modulate the amplitude of a laser ?eld which drives the cavity itself. Here we show that this effect can be exploited to improve the performance of an optomechanical heat engine which makes use of polariton excitations as working ?uid. In particular we demonstrate that, by employing a positive feedback close to the instability threshold, it is possible to operate this engine also under parameters regimes which are not usable without feedback, and which may signi?cantly ease the practical implementation of this device.
关键词： optomechanics,feedback,quantum heat engine
更新于2025-09-23 15:19:57