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DY: Fachverband Dynamik und Statistische Physik

DY 32: Posters DY - Statistical Physics, Brownian Motion and Nonlinear Dynamics

DY 32.24: Poster

Tuesday, March 23, 2021, 16:30–19:00, DYp

Dynamical Casimir interactions with a body in uniform motion and the connection to nonreciprocal media — •Philip Rauch and Matthias Krüger — Institute for Theoretical Physics, Georg-August-Universität, 37077 Göttingen, Germany

The field of the dynamical Casimir effect opened up with the discovery of the phenomenon of vacuum friction acting on accelerated objects in a quantum electrodynamic vacuum. It was later shown that a cold body in vacuum, rotating along it's axis of symmetry, experiences a frictional force and spontaneously radiates energy.

However, the dynamical Casimir effect is not limited to setups with accelerated bodies. Even two parallel plates in relative lateral constant motion experience a frictional force without being in direct contact. The described phenomenas can be explained through the appearance of fluctuating electromagnetic fields, of thermal and quantum nature, in the respective system.

In the context of this work, we intend to extend and generalize the configuration of two parallel plates in relative motion. We study the setup of a translationally invariant body in uniform motion, relative to a body of arbitrary geometry and of reciprocal or nonreciprocal media. The goal is to compute the frictional force between the bodies, which is of relevance for recently developed Casimir engines [1]. As a framework we choose the Rytov formalism, complemented with scattering theory.

[1] David Gelbwaser-Klimovsky, Noah Graham, Mehran Kardar and Matthias Krüger, arXiv preprint arXiv:2012.12768 (2020)