Related papers: A many-body heat engine at criticality

A many-body heat engine at criticality

URL: http://arxiv.org/abs/2006.00725v2
Date: Tue, 1 Dec 2020 01:54:40 GMT
Title: A many-body heat engine at criticality
Authors: Thom\'as Fogarty, Thomas Busch
Abstract summary: 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. The interplay between lattice forces and the particle distribution can lead to a many-body cooperative effect.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: 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.

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