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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