SKM 2021 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
DY: Fachverband Dynamik und Statistische Physik
DY 5: Poster Session III: Statistical Physics, Complex Fluids and Soft Matter
DY 5.5: Poster
Dienstag, 28. September 2021, 17:30–19:30, P
Brownian magneto-gyrator as a tunable microengine — •Iman Abdoli1, René Wittmann2, Joseph Michael Brader3, Jens-Uwe Sommer1,4, Hartmut Löwen2, and Abhinav Sharma1,4 — 1Leibniz-Institut für Polymerforschung Dresden, Institut Theorie der Polymere, Dresden, 01069, Germany — 2Institut für Theoretische Physik II, Weiche Materie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, 40225, Germany — 3Department de Physique, Université de Fribourg, CH-1700 Fribourg, Switzerland — 4Technische Universität Dresden, Institut für Theoretische Physik, Dresden, 01069, Germany
A Brownian particle performs gyrating motion around a potential energy minimum when subjected to thermal noises from two different heat baths. Here, we propose a magneto-gyrator made of a single charged Brownian particle that is steered by an external magnetic field. Key properties, such as the direction of gyration, the torque exerted by the engine on the confining potential and the maximum power delivered by the microengine can be tuned by varying the strength and direction of the applied magnetic field. Further tunability is obtained with a potential that couples the spatial degrees of freedom. We show that in this generic scenario, the microengine can be stalled and even reversed by the magnetic field. Finally, we highlight a property of the magneto-gyrator that has no counterpart in the overdamped approximation--the heat loss from the hot to cold bath requires explicit knowledge of the mass of the particle. Consequently, the efficiency of the microengine is mass-dependent even in the overdamped limit.