Quantum imaging with a photon counting camera

https://www.nature.com/articles/s41598-022-10037-x

"spatial correlations between photons enables imaging systems where preferential selection of photon-pairs... enhancements in noise performance... camera capable resolving number of individual photons in each pixel of detector array record image formed from photon-pair events... achieve greater contrast... ratio of two-photon events compared to one-photon events using spatially correlated SPDC light compared to uncorrelated illumination by LED... low-light microscopy and covert imaging"