A many-body heat engine at criticality
A many-body heat engine at criticality
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DOI：
10.1088/2058-9565/abbc63
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发表时间：
2021-01-01
影响因子：
6.7
通讯作者：
Busch, Thomas
中科院分区：
文献类型：
--
作者：
Fogarty, Thomas;Busch, Thomas
我们表明，量子奥托循环中的介质，相互作用的超冷气体，驱动之间的超流体和绝缘相可以优于类似的单粒子循环。两相之间的能隙的存在可用于改善性能，而晶格力和颗粒分布之间的相互作用可导致多体协同效应。由于有限的时间驱动这个周期可以创建不必要的非平衡动力学，可以显着损害发动机循环的性能，我们还设计了一个近似的捷径绝热的多体状态，可以用来实现一个有效的奥托循环周围的临界点。
We show that a quantum Otto cycle in which the medium, an interacting ultracold gas, is driven between a superfluid and an insulating phase can outperform similar single particle cycles. The presence of an energy gap between the two phases can be used to improve performance, while the interplay between lattice forces and the particle distribution can lead to a many-body cooperative effect. Since finite time driving of this cycle can create unwanted non-equilibrium dynamics which can significantly impair the performance of the engine cycle, we also design an approximate shortcut to adiabaticity for the many-body state that can be used to achieve an efficient Otto cycle around a critical point.