Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 79: Cavity QED and QED III

Q 79.6: Vortrag

Freitag, 6. März 2026, 15:45–16:00, P 4

Casimir forces for nonreciprocal and chiral materials — •Aaron Laszlo Nyerges, Fabian Spallek, and Stefan Yoshi Buhmann — Universität Kassel

The Casimir effect, a manifestation of quantum vacuum fluctuations, remains a vibrant area of research since its prediction in 1948 [1]. Macroscopic Quantum Electrodynamics (QED) provides a foundational framework for studies of Casimir forces in systems with simple geometries and allows for the description of diverse magnetoelectric media with unique properties [2]. In this work, we extend the established solutions for planar multilayer systems of perfectly conducting plates to incorporate generalized material properties. We specifically investigate the Casimir forces generated between plates composed of nonreciprocal media [3], where the Onsager reciprocity relations are violated, and chiral materials with broken parity symmetry. We describe these different media properties on the level of the reflection and transmission coefficients of the material. Our goal is to find a generalized framework to unify these nontrivial electromagnetic properties and to study whether they introduce unique signatures into the Casimir force.

[1] Casimir, H. B. G.: On the attraction between two perfectly conducting plates, Proc. K. Ned. Akad. Wet. 51, 793 (1948). [2] Buhmann, S. Y.: Dispersion Forces I, (Springer, Berlin Heidelberg, 2012). [3] Rode, S., Bennett, R., and Buhmann, S. Y.: Casimir effect for perfect electromagnetic conductors (PEMCs), New. J. Phys. New J. Phys. 20, 043024 (2018).

Keywords: Casimir force; chirality; nonreciprocal media