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Underdamped stochastic heat engine at maximum efficiency
- Autor(en)
- A. Dechant, N. Kiesel, E. Lutz
- Abstrakt
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.
- Organisation(en)
- Quantenoptik, Quantennanophysik und Quanteninformation
- Externe Organisation(en)
- Kyoto University, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Vienna Center for Quantum Science and Technology (VCQ)
- Journal
- Europhysics Letters
- Band
- 119
- Anzahl der Seiten
- 6
- ISSN
- 0295-5075
- DOI
- https://doi.org/10.1209/0295-5075/119/50003
- Publikationsdatum
- 09-2017
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103015 Kondensierte Materie, 103029 Statistische Physik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Allgemeine Physik und Astronomie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/d0e4e109-cdbf-4d7a-b592-03509ef7517f