Linear response theory for cavity QED materials
| Autor: | Román-Roche, Juan, Gómez-León, Álvaro, Luis, Fernando, Zueco, David |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We present a rigorous framework for linear response theory in cavity QED materials. Our approach leverages the collective coupling between light and matter, drawing parallels with large-N theories in quantum field theory. We derive closed formulas for various responses of both the cavity and the matter. Our theory is validated by recovering established results for the Dicke model and the Quantum Hall Effect. Additionally, we discover novel excitations in quantum magnets, where the cavity binds magnon pairs into localized states. Comment: No significant changes in second version, just a cross reference with another preprint |
| Databáze: | arXiv |
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