A quantum mask game: Using squeezed light perform spatially resolving object detection

Four-wave-mixing in hot atomic vapor is a versatile tool for spatially multimode squeezed light generation. We experimentally investigate a scheme that exploits multispatial quantum correlations between twin squeezed vacuum beams in order to resolve the shape of a mask partially obstructing one of the beams. Specifically, this is accomplished using twin homodyne detection with matched local oscillators that are dynamically shaped using a spatial light modulator (SLM). We demonstrate that detecting both of the twin beams allows for enhanced spatial resolution of the obstructing mask compared to using a single multispatial mode classical state of light.