Enhanced two-photon sources in a cavity-coupled two-atom system

Zhicai Chen; Jun Xu; Deyi Kong; Xiangming Hu; Fei Wang

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arXiv · 2607.06932

Enhanced two-photon sources in a cavity-coupled two-atom system

Zhicai Chen·Jun Xu·Deyi Kong·Xiangming Hu·Fei Wang

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Abstract

We propose a component-selective scheme for improving two-photon sources in a cavity-coupled two-atom system, where a single cavity mode interacts with two two-level atoms driven by phase-controlled classical fields of the same frequency. By controlling the atomic detunings and driving phase, the system can be tailored toward optimized cavity-field two-photon blockade or strongly correlated fluorescence photon-pair emission. When the two-cavity-photon component is enhanced, the cavity field exhibits optimized two-photon blockade with simultaneous suppression of unwanted one- and three-photon components at a comparable two-photon population. In another parameter regime, strongly correlated fluorescence photon pairs can also be generated from the two atoms by selecting the double-atomic-excitation component in the same two-excitation manifold. This approach provides a route toward high-quality and versatile two-photon sources, with potential applications in few-photon quantum optics and quantum information processing.

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Zhicai Chen, Jun Xu, Deyi Kong, Xiangming Hu, Fei Wang. 2026-07-08. Enhanced two-photon sources in a cavity-coupled two-atom system. https://arxiv.org/abs/2607.06932

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