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