Work

Cavity-modified Zeeman effect via spin-polariton formation

Year: 2025

Type: article

Abstract: We study the electronic spin Zeeman effect for an effective spin-1/2-system subject to both strong coupling to a low-frequency optical cavity and an external static magnetic field. In particular, we address the interplay between the cavity magnetic field component in a cavity Zeeman interaction and the canonical spin Zeeman interaction from the perspective of an effective spin-polariton Hamiltonian. The latter is derived from the minimal coupling Pauli-Fierz Hamiltonian beyond the common dipole approximation via first-order quasi-degenerate perturbation theory. We find the spin Zeeman effect to be modified in the presence of the cavity field due to the formation of spin-polariton states, which result from an intricate interplay of cavity and external magnetic fields in our model. Spin-polariton signatures are discussed in the context of electron paramagnetic resonance spectroscopy along with cavity-induced modifications of the electronic g-factor.

Source: The Journal of Chemical Physics

DOI: 10.1063/5.0303448

Authors: Eric W. Fischer, Michael Roemelt

Institution: Humboldt-Universität zu Berlin

Language: English

Topic: Strong Light-Matter Interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,500

Funder: Deutsche Forschungsgemeinschaft