Bonn 2025 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 26: Poster – Cold Molecules (joint session MO/Q)

MO 26.3: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

Casimir-Polder Force in a Nonlinear Medium — •Nicolas Schüler, Omar Jesús Franca Santiago, and Stefan Yoshi Buhmann — Institut für Physik, Universität Kassel

The discovery of the Casimir effect in 1948 [1] has, among others, created a new research field involving vacuum forces and fluctuations. The Casimir effect gives rise to the attractive Casimir force [2] between two neutral polarizable bodies in vacuum as well as to the Casimir-Polder force between a particle and a polarizable macroscopic body. In our work, we theoretically investigate the latter for a chiral molecule with three crossed electric dipole transitions. In order for these purely electric contributions to give rise to a chiral force, we consider the interaction with a chiral nonlinear medium. Using macroscopic quantum electrodynamics [3,4], we analytically calculate the resulting energy correction in third order perturbation theory as well as the Casimir-Polder force between an atom in its ground state and the field.

[1] Casimir, H. B. G.: On the attraction between two perfectly conducting plates, Proc. K. Ned. Akad. Wet. 51, 793 (1948)

[2] Casimir, H. B. G., Polder, D.: The influence of Retardation on the London-van der Waals Forces, Phys. Rev. 73, 4 (1948)

[3] Buhmann, S. Y.: Dispersion Forces I. Macroscopic Quantum Electrodynamics and Ground-State Casimir, Casimir-Polder and van der Waals Forces. (Springer, Berlin Heidelberg, 2012)

[4] Lindel, F., Bennett, R., Buhmann, S. Y.: Phys. Rev. A 102, 041701(R) (2020)

Keywords: Casimir-Polder