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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster I

Q 23.7: Poster

Tuesday, March 12, 2024, 17:00–19:00, Tent B

Chiral cavities: an extendible and simple theoretical model — •Carlos Bustamante, Dominik Sidler, Michael Ruggenthaler, and Angel Rubio — Max Planck Institute for the Structure an Dynamics of Matter, Hamburg, Germany.

Over the past decade, we have witnessed a huge growth in cavity quantum electrodynamics phenomena. This growing interest is centered around the formation of polaritons in these cavities --a hybrid quantum state resulting from the strong interaction between light and matter. Polaritons' hybrid nature offers a new alternative to change matter properties by tailoring light. For instance, it is possible to impart spin-angular momentum on photon modes to get circularly polarized light (CPL). Cavities capable of confining CPL are known as chiral cavities. Despite the absence of experimental results, some theoretical studies have already shown that this kind of cavities could be useful in chemistry. However, the simulations conducted thus far are quite challenging due to the necessity of employing beyond-dipole approximations and high levels of accuracy. In this work, we propose a chiral cavity Hamiltonian derived using dipole approximation and a hybrid gauge. To test this Hamiltonian, we worked with a one-dimensional atom, placed in a spring topology, in order to get a chiral symmetry. The results demonstrate that, despite some limitations of the model, our Hamiltonian can capture properties dependent on the polarization of the cavity or the chirality of the matter system. The simplicity of our Hamiltonian offers an efficient way to explore the fundamental physical properties of these systems.

Keywords: optical cavity; chiral cavity; circularly polarized light; quantum electrodynamics; light-matter interaction