期刊
EPL
卷 119, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/119/50003
关键词
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资金
- EU Collaborative Project TherMiQ [618074]
- COST Action [MP1209]
- KAKENHI [15F15324]
- Austrian Science Fund (FWF) [AY0095221]
- Grants-in-Aid for Scientific Research [15F15324] Funding Source: KAKEN
We investigate the performance of an underdamped stochastic heat engine, using the paradigmatic model of a harmonic oscillator with time-dependent frequency. We analytically determine the optimal protocol that maximizes the efficiency at fixed power. The maximum efficiency reduces to the Curzon-Ahlborn formula at maximum power and to the Carnot formula at zero power. We establish that the efficiency at maximum power is universally given by the Curzon-Ahlborn efficiency for weak damping. We further show that even small deviations from operation at maximum power results in a significantly increased efficiency. Copyright (C) EPLA, 2017
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