EXPERIMENTAL QUANTUM TELEPORTATION

Quantum teleportation-the transmission and reconstruction over arbitra ry distances of the state of a quantum system-is demonstrated experime ntally. During teleportation, an initial photon which carries the pola rization that is to be transferred and one of a pair of entangled phot ons are subjected to a measurement such that the second photon of the entangled pair acquires the polarization of the initial photon. This l atter photon can be arbitrarily far away from the initial one. Quantum teleportation will he a critical ingredient for quantum computation n etworks.