Abstract A quantized optical cavity mode controlled by dissipation, two-photon source and feedback loop is studied. The feedback is activated by detections of photons leaving the cavity and consists of rapid phase shifts of the cavity field by π. The steady-state of the mode and first-order field correlation functions let analytical exploration. The feedback radically modifies the shape of the mode's spectrum - it gets asymmetry and its double-peaked structure manifests itself much more discernibly than in no-feedback case. Up to our knowledge, the present quantum feedback model is the first one which permits exact solution.

中文翻译：

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量子光反馈的可解模型

摘要 研究了一种由耗散、双光子源和反馈回路控制的量化光腔模式。反馈通过检测离开腔的光子激活，并且由腔场的快速相移 π 组成。模式和一阶场相关函数的稳态允许分析探索。反馈从根本上改变了模式频谱的形状 - 它变得不对称，并且其双峰结构比无反馈情况下表现得更加明显。据我们所知，目前的量子反馈模型是第一个允许精确解的模型。