A new ultrabright source of entangled photon pairs

At the very heart of applications such as quantum cryptography, computation and teleportation lies a fascinating phenomenon known as "entanglement". Two photons are entangled if the properties of one depend on those of the other, whatever the distance separating them. A new source of entangled photons twenty times brighter than all existing systems has been developed by a French team from the Laboratoire de Photonique et de Nano-structures (LPN) of CNRS.

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