The Ising critical quantum Otto engine
arXiv:2205.09528 · doi:10.1088/1367-2630/ac963b
Abstract
We study a four-stroke Otto engine whose working fluid is a quantum Ising chain. The thermodynamic cycle consists in sweeps of the transverse magnetic field occurring in thermal isolation, alternated by thermalisation strokes with reservoirs at different temperatures. The system-environment coupling is modelled in a thermodynamically consistent way by means of a nonlocal Lindblad master equation. We show that the engine may operate in four different operation modes, depending on the various parameters, in particular it can act as a heat engine and as a refrigerator. We detect an enhancement of the thermodynamic performance as the critical point is crossed, and investigate it in detail.
23 pages, 10 figures, final version
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- Work statistics and Entanglement across the fermionic superfluid-insulator transition
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