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arXiv 2309.04751quant-ph
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光学微腔作为纠缠光子光谱学的平台

Optical microcavities as platforms for entangled photon spectroscopy

Ravyn Malatesta, Lorenzo Uboldi, Evan J. Kumar, Esteban Rojas-Gatjens, Luca Moretti, Andy Cruz, Vinod Menon, Giulio Cerullo, Ajay Ram Srimath Kandada

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AI总结：

本文研究了光学微腔在纠缠光子光谱学中的作用，发现空微腔在单光子或少光子体制下不能简单视为光学滤波器，强耦合微腔在超过阈值时会增强信号与闲置光子的纠缠熵，表明微腔对量子光光谱学具有非中性影响。

摘要：

光学微腔由于具有强光物质耦合，常被提出作为单光子和少光子体制下的光谱学平台。对于经典光光谱学，空微腔仅充当光学滤波器。然而，我们发现，在单光子或少光子体制下，将空微腔视为光学滤波器无法捕捉其对透射光子量子态的全部影响。聚焦于纠缠光子对光谱学的情况，我们考虑了光子对中的一个光子通过光学微腔传播时，如何改变频率纠缠光子对的联合光谱。使用Dicke模型的输入-输出处理，我们发现，通过强耦合微腔的传播在超过一定耦合阈值时会增强信号光子和闲置光子之间的纠缠熵。这些结果表明，光学微腔并非量子光光谱学的中性平台，当使用纠缠熵的变化作为可观测量时，必须仔细考虑其影响。

英文摘要：

Optical microcavities are often proposed as platforms for spectroscopy in the single- and few-photon regime due to strong light-matter coupling. For classical-light spectroscopies, an empty microcavity simply acts as an optical filter. However, we find that in the single- or few-photon regime treating the empty microcavity as an optical filter does not capture the full effect on the quantum state of the transmitted photons. Focusing on the case of entangled photon-pair spectroscopy, we consider how the propagation of one photon through an optical microcavity changes the joint spectrum of a frequency-entangled photon pair. Using the input-output treatment of a Dicke model, we find that propagation through a strongly coupled microcavity above a certain coupling threshold enhances the entanglement entropy between the signal and idler photons. These results show that optical microcavities are not neutral platforms for quantum-light spectroscopies and their effects must be carefully considered when using change in entanglement entropy as an observable.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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