Can quantum-entangled photon pairs see through foggy, murky media?

Using pairs of quantum-entangled photons, researchers show that detecting only coincident, spatially correlated hits filters out scattered light and background noise simultaneously — without needing time-gating hardware or adaptive optics. Experiments confirmed that image contrast improves in both one- and two-photon illumination setups, though the trade-off is higher shot noise from fewer usable events. The technique could matter anywhere conventional scatter-rejection tools are impractical, such as compact medical or underwater imagers.