Noise-tolerant object detection and ranging using quantum correlations

Imaging, detection and ranging of objects in the presence significant background noise is a fundamental challenge optical sensing. Overcoming limitations imposed conventional methods, quantum light sources show higher resistance against time-correlation-based illumination. Here, we introduce advantage using not only time correlations but also polarization photon pairs an object that embedded noisy background. In this direction, time- polarization-correlated pair source spontaneous parametric down-conversion process exploited. We found joint measurement correlated allows distinguishing signal from photons leads to improved signal-to-noise ratio. Our comparative study revealed addition provides rejection. Furthermore, correlation undoing detector limitation where high often saturation.