Time-resolved interplay between superradiant and subradiant states in superradiance lattices of Bose-Einstein condensates
Time-resolved interplay between superradiant and subradiant states in superradiance lattices of Bose-Einstein condensates
复制标题
玻色-爱因斯坦凝聚体超辐射晶格中超辐射和次辐射态之间的时间分辨相互作用
DOI：
10.1103/physreva.104.043326
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发表时间：
2021-10-28
影响因子：
2.9
通讯作者：
Zhang, Jing
中科院分区：
文献类型：
--
作者：
Mi, Chengdong;Nawaz, Khan Sadiq;Zhang, Jing
许多原子的集体自发发射与单个原子的集体自发发射有很大的不同，这取决于原子系综的几何形状和相关联。然而，原子的任意超辐射和次辐射状态的实验观测仍然具有挑战性，因为这些状态的制备和检测都很困难。本文报道了在玻色-爱因斯坦凝聚体的动量-空间超辐射晶格中从定时Dicke态观测到的超辐射的时间分辨观测，这使得在现场测量涉及超辐射态和次辐射态的相干晶格动力学成为可能。超辐射发射中的长时间振荡是由超辐射晶格中次辐射态的居群输运引起的。这项工作为制备和观察子态铺平了道路，在量子信息处理中具有很好的应用前景。
The collective spontaneous emission of many atoms is significantly different from that of a single atom, depending on the geometry and the phase correlation of atomic ensembles. However, experimental observation of arbitrary superradiant and subradiant states of atoms remains challenging due to the difficulties in both preparation and detection of those states. Here we report the time-resolved observation of superradiance from a timed Dicke state in a momentum-space superradiance lattice of Bose-Einstein condensates, which enables an in situ measurement of the coherent lattice dynamics involving both superradiant and subradiant states. The long-lasting oscillation in the superradiant emission is contributed by population transport from the subradiant states in the superradiance lattice. This work paves the way to prepare and observe subradiant states, which has promising applications in quantum information processing.