Hybrid light-matter boundaries of graphene in a chiral cavity

• URL: http://arxiv.org/abs/2510.13373v1
• Date: Wed, 15 Oct 2025 10:05:45 GMT
• Title: Hybrid light-matter boundaries of graphene in a chiral cavity
• Authors: Volker Karle, Oriana K. Diessel, Vasil Rokaj, Ceren B. Dağ,
• Abstract summary: Recent advances in chiral cavities that can couple coherently to two-dimensional materials have opened a powerful route to reshape electronic topology without an external drive.<n>We show that every light-matter interaction-induced gap hosts pairs of unidirectional light-matter edge currents depending on the Chern number of the band.<n>Our results predict an experimental signature of the hybrid band topology and a blueprint for reconfigurable chiral channels in next-generation quantum-optical devices.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent advances in chiral cavities that can couple coherently to two-dimensional materials have opened a powerful route to reshape electronic topology without an external drive. Here we establish the bulk-boundary correspondence for graphene embedded in a circularly polarized cavity. By combining exact diagonalization (ED) of zigzag ribbons, a semi-analytic T-matrix for half-infinite lattices, and analytical insights from a Dirac-Jaynes-Cummings model, we show that (i) every light-matter interaction-induced gap hosts pairs of unidirectional light-matter edge currents depending on the Chern number of the band while some of them are even bright; (ii) these chiral states persist throughout the entire photon ladder; and (iii) their dispersion, localization length and photon distribution exhibit a universal scaling controlled by the light-matter interaction. Time-evolution simulations further demonstrate that a dark electronic edge excitation can be converted into a bright and unidirectionally propagating current, that remains coherent over long time scales. Our results predict an experimental signature of the hybrid band topology and a blueprint for reconfigurable chiral channels in next-generation quantum-optical devices.

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