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Shortcut-to-adiabaticity quantum Otto refrigerator

Lookup NU author(s): Dr Obinna AbahORCiD

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Abstract

We investigate the performance of a quantum Otto refrigerator operating in finite time and exploiting local counterdiabatic techniques. We evaluate its coefficient of performance and cooling power when the working medium consists of a quantum harmonic oscillator with a time-dependent frequency. We find that the quantum refrigerator outperforms its conventional counterpart, except for very short cycle times, even when the driving cost of the local counterdiabatic driving is included. We moreover derive upper bounds on the performance of the thermal machine based on quantum speed limits and show that they are tighter than the second law of thermodynamics.

Publication metadata

Author(s): Abah O, Paternostro M, Lutz E

Publication type: Article

Publication status: Published

Journal: Physical Review Research

Year: 2020

Volume: 2

Online publication date: 04/05/2020

Acceptance date: 06/04/2020

Date deposited: 14/06/2022

ISSN (electronic): 2643-1564

Publisher: American Physical Society

URL: https://doi.org/10.1103/PhysRevResearch.2.023120

DOI: 10.1103/PhysRevResearch.2.023120

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