Collective Spin-Light and Light-Mediated Spin-Spin Interactions in an Optical Cavity
Collective Spin-Light and Light-Mediated Spin-Spin Interactions in an Optical Cavity
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DOI：
10.1103/prxquantum.3.020308
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发表时间：
2021-06
期刊：
影响因子：
9.7
通讯作者：
Zeyang Li;B. Braverman;S. Colombo;C. Shu;A. Kawasaki;A. Adiyatullin;E. Pedrozo-Peñafiel;E. Mendez;V. Vuleti'c
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文献类型：
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作者：
Zeyang Li;B. Braverman;S. Colombo;C. Shu;A. Kawasaki;A. Adiyatullin;E. Pedrozo-Peñafiel;E. Mendez;V. Vuleti'c
在高精细光学腔中，原子系综和光模式之间的相互作用可以很容易地达到量子效应占主导地位的强耦合状态。在这种情况下，相互作用可以产生原子光和原子纠缠。我们分析了对集体原子态和光场的主要影响，并推导出一种统一的方法，可以解释由光场测量和完全忽略光场状态引起的原子纠缠。我们给出了由相互作用引起的纠缠的解析表达式，并确定了在量子传感器和原子钟中使纠缠引起的增益超过标准量子极限的最大化条件。
The interaction between an atomic ensemble and a light mode in a high-finesse optical cavity can easily reach the strong-coupling regime, where quantum effects dominate. In this regime, the interaction can be used to generate both atom-light and atom-atom entanglement. We analyze the dominant effects on the collective atomic state and the light field, and derive a unified approach that can account for atomic entanglement induced both by measurements on the light field, and by ignoring the state of the light field altogether. We present analytical expressions for the entanglement induced by the interaction, and determine the conditions that maximize the entanglement-induced gain over the standard quantum limit in quantum sensors and atomic clocks.