Photon-Mediated Spin-Exchange Dynamics of Spin-1 Atoms
Photon-Mediated Spin-Exchange Dynamics of Spin-1 Atoms
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DOI：
10.1103/physrevlett.122.010405
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发表时间：
2019-01-09
影响因子：
8.6
通讯作者：
Schleier-Smith, Monika H.
中科院分区：
文献类型：
--
作者：
Davis, Emily J.;Bentsen, Gregory;Schleier-Smith, Monika H.
我们报告了在原子系综中光子介导的自旋交换相互作用的直接观察。在光学谐振器中，与单模光耦合的冷铷原子云内产生了延伸超过500 μ m距离的相互作用。我们通过淬火动力学和局部磁化成像来表征系统，验证相互作用的相干性，并演示其强度和符号的光学控制。此外，通过初始化m(f) = 0 Zeeman状态下的自旋-1系统，我们观察到m(f) = +/- 1状态下的相关对产生，这一过程类似于自发参数下转换和玻色-爱因斯坦凝聚中的自旋混合。我们的工作为远程相互作用的量子模拟和纠缠增强计量学开辟了新的机会。
We report direct observations of photon-mediated spin-exchange interactions in an atomic ensemble. Interactions extending over a distance of 500 mu m are generated within a cloud of cold rubidium atoms coupled to a single mode of light in an optical resonator. We characterize the system via quench dynamics and imaging of the local magnetization, verifying the coherence of the interactions and demonstrating optical control of their strength and sign. Furthermore, by initializing the spin-1 system in the m(f) = 0 Zeeman state, we observe correlated pair creation in the m(f) = +/- 1 states, a process analogous to spontaneous parametric down-conversion and to spin mixing in Bose-Einstein condensates. Our work opens new opportunities in quantum simulation with long-range interactions and in entanglement-enhanced metrology.