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arXiv · 2107.11775

Certifying multi-mode light-matter interaction in lossy resonators

Dominik Lentrodt·Oliver Diekmann·Christoph H. Keitel·Stefan Rotter·Jörg Evers
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Abstract

Quantum models based on few-mode Master equations have been a central tool in the study of resonator quantum electrodynamics, extending the seminal single-mode Jaynes-Cummings model to include loss and multiple modes. Despite their broad application range, previous approaches within this framework have either relied on a Markov approximation or a fitting procedure. By combining ideas from pseudomode and quasinormal mode theory, we develop a certification criterion for multi-mode effects in lossy resonators. It is based on a witness observable, and neither requires a fitting procedure nor a Markov approximation. Using the resulting criterion, we demonstrate that such multi-mode effects are important for understanding previous experiments in X-ray cavity QED with M\"ossbauer nuclei and that they allow one to tune the nuclear ensemble properties.

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Dominik Lentrodt, Oliver Diekmann, Christoph H. Keitel, Stefan Rotter, Jörg Evers. 2021-07-25. Certifying multi-mode light-matter interaction in lossy resonators. https://doi.org/10.1103/physrevlett.130.263602

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