Photon correlation transients in a weakly blockaded Rydberg ensemble
Photon correlation transients in a weakly blockaded Rydberg ensemble
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DOI：
10.1088/1361-6455/ab728f
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
C. Möhl;N. L. R. Spong;Y. Jiao;Chloe So;T. Ilieva;M. Weidemüller;C. Adams
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文献类型：
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作者：
C. Möhl;N. L. R. Spong;Y. Jiao;Chloe So;T. Ilieva;M. Weidemüller;C. Adams
电磁感应透明（EIT）下原子里德伯介质的非线性和非局域效应使其成为量子信息基础研究和应用的通用平台。在本文中，我们研究了一个系综中的Rydberg-EIT系统的动力学，该系综允许在传播方向上有一个以上的Rydberg激发。二能级原子的密度使得瞬态超辐射效应发生。在EIT条件下，我们实验观察到二能级原子的相干集体辐射（“闪光”）到里德伯修饰区（“修饰闪光”）之间的交叉。复杂的动力学的特点是使用强度和时间相关性测量。我们表明，虽然稳态EIT给出了二阶相关g（2）= 0.79 ± 0.04，里德伯装饰闪光表现出反聚束下降到0.2 ± 0.04。
The nonlinear and non-local effects in atomic Rydberg media under electromagnetically induced transparency (EIT) make it a versatile platform for fundamental studies and applications in quantum information. In this paper, we study the dynamics of a Rydberg-EIT system in an ensemble that allows for more than one Rydberg excitation in the propagation direction. The density of two-level atoms is such that transient superradiant effects occur. We experimentally observe a cross-over between coherent collective emission (‘flash’) of two-level atoms to a Rydberg dressed regime (‘dressed flash’) under EIT condition. The complex dynamics are characterised using both intensity and time correlation measurements. We show that while steady-state EIT gives a second order correlation g(2) = 0.79 ± 0.04, the Rydberg-dressed flash exhibits anti-bunching down to 0.2 ± 0.04.