Spatial Multiplexing of Squeezed Light by Coherence Diffusion.
Spatial Multiplexing of Squeezed Light by Coherence Diffusion.
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DOI：
10.1103/physrevlett.123.203604
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发表时间：
2018-11
影响因子：
8.6
通讯作者：
Jian Sun-;Xichang Zhang;Weizhi Qu;E. Mikhailov;I. Novikova;Heng Shen;Yanhong Xiao
中科院分区：
文献类型：
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作者：
Jian Sun-;Xichang Zhang;Weizhi Qu;E. Mikhailov;I. Novikova;Heng Shen;Yanhong Xiao
由于分束过程中的噪声污染，原则上禁止对非经典光束进行空间分束。我们提出了一种基于原子热运动的平台来实现压缩光的空间复用。在反弛豫涂层蒸汽室中，不同空间模的光通道共享由所有通道通过原子的相干扩散共同创建的相同的长寿命原子相干性，这反过来又增强了单个通道负责光压缩的非线性过程。因此，即使在激光功率低于压缩光产生阈值的情况下，它也表现为一个光学通道中的压缩光转移到其他远距离通道。利用低功率∼毫瓦激光产生了压缩光束阵列。这种方法在多节点量子网络和量子增强技术(如量子成像和传感)中有着巨大的应用前景。
Spatially splitting nonclassical light beams is in principle prohibited due to noise contamination during beam splitting. We propose a platform based on thermal motion of atoms to realize spatial multiplexing of squeezed light. Light channels of separate spatial modes in an antirelaxation coated vapor cell share the same long-lived atomic coherence jointly created by all channels through the coherent diffusion of atoms, which in turn enhances the individual channel's nonlinear process responsible for light squeezing. Consequently, it behaves as squeezed light in one optical channel transferring to other distant channels even with laser powers below the threshold for squeezed light generation. An array of squeezed light beams is created with low laser power ∼ milliwatt. This approach holds great promise for applications in a multinode quantum network and quantum enhanced technologies such as quantum imaging and sensing.