Researchers from the Institut des NanoSciences de Paris, the Kastler Brossel Laboratory and the University of Glasgow have developed an innovative method that renders a scattering medium transparent solely for information carried by entangled photon pairs, while the same medium remains completely opaque to classical light.

Their works are published in the journals Optica (optimization) and Nature Physics (selective image transmission).

Faithfully transmitting spatial information, such as the image of an object, is a major challenge in modern optics. However, this task becomes complex as soon as light travels through disordered media, such as biological tissues, atmospheric turbulence, or multimode optical fibers. In these environments, scattering scrambles the information, making the final image completely unreadable.