An interaction-driven many-particle quantum heat engine and its universal behavior
An interaction-driven many-particle quantum heat engine and its universal behavior
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相互作用驱动的多粒子量子热机及其普遍行为
DOI：
10.1038/s41534-019-0204-5
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发表时间：
2019-10-17
影响因子：
7.6
通讯作者：
del Campo, Adolfo
中科院分区：
文献类型：
--
作者：
Chen, Yang-Yang;Watanabe, Gentaro;del Campo, Adolfo
介绍了一种基于多粒子相互作用驱动的量子热机。该循环交替等容加热和冷却冲程与同时等容和等熵的相互作用驱动的过程。当工作物质被限制在一个紧密的波导管，循环的效率变得普遍在低温下，并由一个Luttinger液体的速度比。我们证明了与相互作用的玻色气体作为工作介质的发动机的性能，并表明，每个粒子的平均工作是最大的临界状态。我们进一步讨论了基于相互作用强度对外部自旋自由度的依赖性的功外耦合机制。
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.