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Entropy 2016, 18(5), 168; doi:10.3390/e18050168

Scaling-Up Quantum Heat Engines Efficiently via Shortcuts to Adiabaticity

1
Department of Physics, University of Massachusetts, Boston, MA 02125, USA
2
Dublin Institute for Advanced Studies, School of Theoretical Physics, Dublin 4, Ireland
3
Department of Physics, National University of Singapore, Singapore 117551, Singapore
*
Author to whom correspondence should be addressed.
Academic Editor: Ronnie Kosloff
Received: 24 March 2016 / Revised: 22 April 2016 / Accepted: 25 April 2016 / Published: 30 April 2016
(This article belongs to the Special Issue Quantum Thermodynamics)
View Full-Text   |   Download PDF [497 KB, uploaded 30 April 2016]   |  

Abstract

The finite-time operation of a quantum heat engine that uses a single particle as a working medium generally increases the output power at the expense of inducing friction that lowers the cycle efficiency. We propose to scale up a quantum heat engine utilizing a many-particle working medium in combination with the use of shortcuts to adiabaticity to boost the nonadiabatic performance by eliminating quantum friction and reducing the cycle time. To this end, we first analyze the finite-time thermodynamics of a quantum Otto cycle implemented with a quantum fluid confined in a time-dependent harmonic trap. We show that nonadiabatic effects can be controlled and tailored to match the adiabatic performance using a variety of shortcuts to adiabaticity. As a result, the nonadiabatic dynamics of the scaled-up many-particle quantum heat engine exhibits no friction, and the cycle can be run at maximum efficiency with a tunable output power. We demonstrate our results with a working medium consisting of particles with inverse-square pairwise interactions that includes non-interacting and hard-core bosons as limiting cases. View Full-Text
Keywords: quantum thermodynamics; shortcut to adiabaticity; interacting Bose gas quantum thermodynamics; shortcut to adiabaticity; interacting Bose gas
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Beau, M.; Jaramillo, J.; del Campo, A. Scaling-Up Quantum Heat Engines Efficiently via Shortcuts to Adiabaticity. Entropy 2016, 18, 168.

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