An interaction-driven many-particle quantum heat engine and its universal behavior
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.
- Publication:
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npj Quantum Information
- Pub Date:
- December 2019
- DOI:
- arXiv:
- arXiv:1812.09327
- Bibcode:
- 2019npjQI...5...88C
- Keywords:
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- Quantum Physics;
- Condensed Matter - Quantum Gases;
- Physics - Atomic Physics
- E-Print:
- 6+6pp, 3+2 figures