Superradiant emission of a thermal atomic beam into an optical cavity
Superradiant emission of a thermal atomic beam into an optical cavity
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DOI：
10.1103/physreva.104.033711
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发表时间：
2021-05
影响因子：
2.9
通讯作者：
Simon B. Jäger;Haonan Liu;J. Cooper;T. Nicholson;M. Holland
中科院分区：
文献类型：
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作者：
Simon B. Jäger;Haonan Liu;J. Cooper;T. Nicholson;M. Holland
我们从理论上分析了原子偶极子热光束在穿过光学腔时耦合到单模时的集体动力学。为此，我们推导了一个半经典模型，并确定了超辐射发射的起始点及其稳定性。我们导出了发射光线宽的解析表达式，并与数值模拟进行了比较。此外，我们发现并预测了两个不同的超辐射相；一个稳态超辐射相和一个多分量超辐射相。在后一种情况下，我们观察到频谱中的边带，可以使用集体偶极子振幅模式的稳定性分析来计算。研究表明，这两种超辐射相对自由空间自发发射和T2脱相过程都具有鲁棒性。
We theoretically analyze the collective dynamics of a thermal beam of atomic dipoles that couple to a single mode when traversing an optical cavity. For this setup we derive a semiclassical model and determine the onset of superradiant emission and its stability. We derive analytical expressions for the linewidth of the emitted light and compare them with numerical simulations. In addition, we find and predict two different superradiant phases; a steady-state superradiant phase and a multicomponent superradiant phase. In the latter case we observe sidebands in the frequency spectrum that can be calculated using a stability analysis of the amplitude mode of the collective dipole. We show that both superradiant phases are robust against free-space spontaneous emission and T2 dephasing processes.