Many-Body Amplified Nonclassical Photon Emission in Cavity-Coupled Atomic Arrays

Quantum Physics [Submitted on 17 Apr 2026] Many-Body Amplified Nonclassical Photon Emission in Cavity-Coupled Atomic Arrays Tang Jing, Yuangang Deng The generation of high-performance nonclassical light remains a cornerstone of quantum technologies, yet faces a fundamental trade-off between emission purity and brightness. Here, we demonstrate that cavity-mediated many-body spin-exchange interactions provide a route to overcome this constraint by collectively amplifying spectral anharmonicity. In a cavity-coupled atomic array with a programmable relative phase \phi, the resulting interference-interaction mechanism reshapes the dressed-state manifold and enables deterministic switching between distinct quantum emission regimes. For \phi=0, constructive interference yields high-purity single-photon emission with antibunching improved by four orders of magnitude while preserving strong photon flux. Conversely, for \phi=\pi, destructive interference creates a dark single-photon manifold, resonantly activating two-photon processes to produce bright and pure photon-pair bundles. Our work establishes interference-engineered many-body interactions as a scalable mechanism for on-demand quantum light generation and open a new avenue for harnessing collective many-body physics in quantum photonics. Comments: 8 pages, 4 figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.15604 [quant-ph]   (or arXiv:2604.15604v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.15604 Focus to learn more Submission history From: Yuangang Deng [view email] [v1] Fri, 17 Apr 2026 01:08:23 UTC (5,208 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?)