Thermalization Regimes in a Chaotic Tavis-Cummings Model

Quantum Physics [Submitted on 22 Apr 2026] Thermalization Regimes in a Chaotic Tavis-Cummings Model Sameer Dambal, Eric R. Bittner This work investigates the emergent thermalization regimes in a chaotic Tavis-Cummings (TC) model and their implications in quantum spectroscopy. While the TC model is a cornerstone of cavity quantum electrodynamics, traditional treatments often overlook many-body effects that arise in the thermodynamic limit. We utilize the Eigenstate Thermalization Hypothesis to demonstrate that a non-integrable excitonic Hamiltonian within the material manifold drives local thermalization. By tuning the polariton splitting g, we observe two dynamical regimes: a thermalizing regime at low interactions driven by quantum chaos and ergodicity, and a non-thermalizing regime at high interactions where strong coupling suppresses ergodicity. We further show that these regimes have direct implications on output photon statistics, specifically influencing the correlation times \tau_c of the cavity population and the second-order correlation function g^{(2)}(t+\tau). We propose that entangled-biphoton spectroscopy serves as an ideal experimental platform to probe these effects and to allow the characterization of the underlying many-body exciton-coupling disorder \sigma through coincidence measurements of the output. Taken together, these results exploit a naturally occurring many-body phenomenon to bridge theoretical predictions with experimental observables. Comments: 12 pages, 7 figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.20955 [quant-ph]   (or arXiv:2604.20955v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.20955 Focus to learn more Submission history From: Sameer Dambal [view email] [v1] Wed, 22 Apr 2026 18:00:01 UTC (4,440 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-04 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)