Many-Body Amplified Nonclassical Photon Emission in Cavity-Coupled Atomic Arrays
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866913040744579072 |
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| author | Jing, Tang Deng, Yuangang |
| author_facet | Jing, Tang Deng, Yuangang |
| contents | 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 $ϕ$, the resulting interference-interaction mechanism reshapes the dressed-state manifold and enables deterministic switching between distinct quantum emission regimes. For $ϕ=0$, constructive interference yields high-purity single-photon emission with antibunching improved by four orders of magnitude while preserving strong photon flux. Conversely, for $ϕ=π$, 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_15604 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Many-Body Amplified Nonclassical Photon Emission in Cavity-Coupled Atomic Arrays Jing, Tang Deng, Yuangang Quantum Physics 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 $ϕ$, the resulting interference-interaction mechanism reshapes the dressed-state manifold and enables deterministic switching between distinct quantum emission regimes. For $ϕ=0$, constructive interference yields high-purity single-photon emission with antibunching improved by four orders of magnitude while preserving strong photon flux. Conversely, for $ϕ=π$, 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. |
| title | Many-Body Amplified Nonclassical Photon Emission in Cavity-Coupled Atomic Arrays |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.15604 |