Figure 1 | Working principle and experimental setup of the squeezed-light array. (IMAGE)
Caption
Figure 1 | Working principle and experimental setup of the squeezed-light array. a, simplified atomic level scheme for polarization squeezing and a Poincaré-sphere representation of the polarization-squeezed state. b, experimental setup in which a diffractive optical element generates multiple spatially separated beams that propagate through a single paraffin-coated rubidium vapor cell. Thermal atomic motion transports and homogenizes long-lived ground-state coherence throughout the cell, thereby mediating global dissipative coupling among the optical channels. c, schematic illustration of aligned squeezing ellipses across the array, representing nearly identical squeezing levels and squeezing directions enabled by the global coupling.
Credit
Dongdong Hao et al.
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CC BY