Regensburg 2025 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 9: Statistical Physics far from Thermal Equilibrium

DY 9.2: Talk

Monday, March 17, 2025, 15:15–15:30, H47

Propulsion force and heat exchange for nonreciprocal nanoparticles — •Laila Henkes¹, Kiryl Asheichyk², and Matthias Krüger¹ — ¹Institute for Theoretical Physics, Georg-August-Universität — ²Department of Theoretical Physics and Astrophysics, Belarusian State University

Nonreciprocity allows for interesting new phenomena in Casimir physics, such as propulsion forces pointing in translationally invariant directions, and persistent heat currents between objects of the same temperatures. To study these quantities, we derive general formulas for heat transfer and Casimir force involving a non-reciprocal point particle. These display how nonreciprocity of the particle couples to the nonreciprocity of the surrounding and also yield conditions for persistent heat current or propulsion force. Furthermore, we find a bound for the propulsion force acting on a point particle in terms of its heat exchange. This is, e.g., relevant for the efficiency of this arrangement when used as a heat engine.

Keywords: radiative heat transfer; Casimir force; out of equilibrium; fluctuational electrodynamics; nonreciprocal