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Efficiency of Harmonic Quantum Otto Engines at Maximal Power

Recent experimental breakthroughs produced the first nano heat engines that have the potential to harness quantum resources. An instrumental question is how their performance measures up against the efficiency of classical engines. For single ion engines undergoing quantum Otto cycles it has been fo...

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Autor principal: Deffner, Sebastian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7512451/
https://www.ncbi.nlm.nih.gov/pubmed/33266599
http://dx.doi.org/10.3390/e20110875
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author Deffner, Sebastian
author_facet Deffner, Sebastian
author_sort Deffner, Sebastian
collection PubMed
description Recent experimental breakthroughs produced the first nano heat engines that have the potential to harness quantum resources. An instrumental question is how their performance measures up against the efficiency of classical engines. For single ion engines undergoing quantum Otto cycles it has been found that the efficiency at maximal power is given by the Curzon–Ahlborn efficiency. This is rather remarkable as the Curzon–Alhbron efficiency was originally derived for endoreversible Carnot cycles. Here, we analyze two examples of endoreversible Otto engines within the same conceptual framework as Curzon and Ahlborn’s original treatment. We find that for endoreversible Otto cycles in classical harmonic oscillators the efficiency at maximal power is, indeed, given by the Curzon–Ahlborn efficiency. However, we also find that the efficiency of Otto engines made of quantum harmonic oscillators is significantly larger.
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spelling pubmed-75124512020-11-09 Efficiency of Harmonic Quantum Otto Engines at Maximal Power Deffner, Sebastian Entropy (Basel) Article Recent experimental breakthroughs produced the first nano heat engines that have the potential to harness quantum resources. An instrumental question is how their performance measures up against the efficiency of classical engines. For single ion engines undergoing quantum Otto cycles it has been found that the efficiency at maximal power is given by the Curzon–Ahlborn efficiency. This is rather remarkable as the Curzon–Alhbron efficiency was originally derived for endoreversible Carnot cycles. Here, we analyze two examples of endoreversible Otto engines within the same conceptual framework as Curzon and Ahlborn’s original treatment. We find that for endoreversible Otto cycles in classical harmonic oscillators the efficiency at maximal power is, indeed, given by the Curzon–Ahlborn efficiency. However, we also find that the efficiency of Otto engines made of quantum harmonic oscillators is significantly larger. MDPI 2018-11-15 /pmc/articles/PMC7512451/ /pubmed/33266599 http://dx.doi.org/10.3390/e20110875 Text en © 2018 by the author. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Deffner, Sebastian
Efficiency of Harmonic Quantum Otto Engines at Maximal Power
title Efficiency of Harmonic Quantum Otto Engines at Maximal Power
title_full Efficiency of Harmonic Quantum Otto Engines at Maximal Power
title_fullStr Efficiency of Harmonic Quantum Otto Engines at Maximal Power
title_full_unstemmed Efficiency of Harmonic Quantum Otto Engines at Maximal Power
title_short Efficiency of Harmonic Quantum Otto Engines at Maximal Power
title_sort efficiency of harmonic quantum otto engines at maximal power
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7512451/
https://www.ncbi.nlm.nih.gov/pubmed/33266599
http://dx.doi.org/10.3390/e20110875
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