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DOE OSTI · 1768538

An interaction-driven many-particle quantum heat engine and its universal behavior

Del Campo, Adolfo·Chen, Yang-Yang·Watanabe, Gentaro·Yu, Yi-Cong·Guan, Xi-Wen
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Abstract

A quantum heat engine (QHE) based on the interaction driving of a many-particle working medium is introduced. The cycle alternates isochoric heating and cooling strokes with both interaction-driven processes that are simultaneously isochoric and isentropic. When the working substance is confined in a tight waveguide, the efficiency of the cycle becomes universal at low temperatures and governed by the ratio of velocities of a Luttinger liquid. We demonstrate the performance of the engine with an interacting Bose gas as a working medium and show that the average work per particle is maximum at criticality. We further discuss a work outcoupling mechanism based on the dependence of the interaction strength on the external spin degrees of freedom.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

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Del Campo, Adolfo, Chen, Yang-Yang, Watanabe, Gentaro, Yu, Yi-Cong, Guan, Xi-Wen. 2019-10-17. An interaction-driven many-particle quantum heat engine and its universal behavior. https://doi.org/10.1038/s41534-019-0204-5

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