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Spatially splitting nonclassical light beams is in principle prohibited dueto noise contamination during beam splitting. We propose a platform based onthermal motion of atoms to realize spatial multiplexing of squeezed light.Light channels of separate spatial modes in an anti-relaxation coated vaporcell share the same long-lived atomic coherence jointly created by all channelsthrough the coherent diffusion of atoms which in turn enhances individualchannel's nonlinear process responsible for light squeezing. Consequently, itbehaves as squeezed light in one optical channel transferring to other distantchannels even with laser powers below the threshold for squeezed lightgeneration. An array of squeezed light beams was created with low laser power$\sim\text{mW}$. This approach holds great promise for applications inmulti-node quantum network and quantum enhanced technologies such as quantumimaging and sensing.

Spatial multiplexing of squeezed light by coherence diffusion