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Lookup NU author(s): Dr Obinna AbahORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
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.
Author(s): Abah O, Paternostro M, Lutz E
Publication type: Article
Publication status: Published
Journal: Physical Review Research
Online publication date: 04/05/2020
Acceptance date: 06/04/2020
Date deposited: 14/06/2022
ISSN (electronic): 2643-1564
Publisher: American Physical Society
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