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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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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2018
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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. |
format | Online Article Text |
id | pubmed-7512451 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT deffnersebastian efficiencyofharmonicquantumottoenginesatmaximalpower |