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

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

URL: http://arxiv.org/abs/2604.15604v1
Date: Fri, 17 Apr 2026 01:08:23 GMT
Title: Many-Body Amplified Nonclassical Photon Emission in Cavity-Coupled Atomic Arrays
Abstract summary: Generation of high-performance nonclassical light faces a trade-off between emission purity and brightness.<n>We show that cavity-mediated many-body spin-exchange interactions provide a route to overcome this constraint.<n>Our work establishes interference-engineered many-body interactions as a scalable mechanism for on-demand quantum light generation.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: 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.

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