Certifying multi-mode light-matter interaction in lossy resonators

• URL: http://arxiv.org/abs/2107.11775v4
• Date: Thu, 16 Mar 2023 15:37:27 GMT
• Title: Certifying multi-mode light-matter interaction in lossy resonators
• Authors: Dominik Lentrodt, Oliver Diekmann, Christoph H. Keitel, Stefan Rotter and J\"org Evers
• Abstract summary: 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. We demonstrate that such multi-mode effects are important for understanding previous experiments in X-ray cavity QED with M"ossbauer nuclei.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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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