We theoretically investigate the spontaneous quantum emission of phonon pairs by superradiant processes in an atomic Bose-Einstein condensate subject to a synthetic vector potential. Within the analog gravity perspective, this effect corresponds to the spontaneous emission of radiation from the ergosurface of rotating black holes. A general input-output formalism is built and used to characterize the spectral and correlation properties of the emission. Experimentally accessible signatures of the emission are pointed out in the correlation functions of the atomic gas.

中文翻译：

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受合成矢量势影响的原子玻色-爱因斯坦凝聚中的自发量子超辐射发射

我们从理论上研究了受合成矢量势影响的原子玻色-爱因斯坦凝聚中的超辐射过程声子对的自发量子发射。在模拟重力视角内，这种效应对应于自旋转黑洞的麦角表面辐射的自发发射。构建了一个通用的输入输出形式，并用于表征发射的光谱和相关特性。在原子气体的相关函数中指出了实验上可获得的发射特征。