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Experimental realization of a minimal microscopic heat engine
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
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Number of Authors: 72017 (English)In: Physical review. E, ISSN 2470-0045, E-ISSN 2470-0053, Vol. 96, no 5, article id 052106Article in journal (Refereed) Published
Abstract [en]

Microscopic heat engines are microscale systems that convert energy flows between heat reservoirs into work or systematic motion. We have experimentally realized a minimal microscopic heat engine. It consists of a colloidal Brownian particle optically trapped in an elliptical potential well and simultaneously coupled to two heat baths at different temperatures acting along perpendicular directions. For a generic arrangement of the principal directions of the baths and the potential, the symmetry of the system is broken, such that the heat flow drives a systematic gyrating motion of the particle around the potential minimum. Using the experimentally measured trajectories, we quantify the gyrating motion of the particle, the resulting torque that it exerts on the potential, and the associated heat flow between the heat baths. We find excellent agreement between the experimental results and the theoretical predictions.

Place, publisher, year, edition, pages
2017. Vol. 96, no 5, article id 052106
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Physical Sciences
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URN: urn:nbn:se:su:diva-149987DOI: 10.1103/PhysRevE.96.052106ISI: 000414423500002OAI: oai:DiVA.org:su-149987DiVA, id: diva2:1169010
Available from: 2017-12-22 Created: 2017-12-22 Last updated: 2017-12-22Bibliographically approved

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Bo, StefanoEichhorn, Ralf
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