Teleportation of a Vacuum–One-Photon Qubit

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Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels

Charles Bennett, Gilles Brassard, Claude Crépeau … (1993)

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Unconditional quantum teleportation

Furusawa, Sorensen, Braunstein … (1998)

Quantum teleportation of optical coherent states was demonstrated experimentally using squeezed-state entanglement. The quantum nature of the achieved teleportation was verified by the experimentally determined fidelity Fexp = 0.58 +/- 0.02, which describes the match between input and output states. A fidelity greater than 0.5 is not possible for coherent states without the use of entanglement. This is the first realization of unconditional quantum teleportation where every state entering the device is actually teleported.

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Experimental quantum teleportation

Dik Bouwmeester, Jian-Wei Pan, Klaus Mattle … (2019)

Quantum teleportation -- the transmission and reconstruction over arbitrary distances of the state of a quantum system -- is demonstrated experimentally. During teleportation, an initial photon which carries the polarization that is to be transferred and one of a pair of entangled photons are subjected to a measurement such that the second photon of the entangled pair acquires the polarization of the initial photon. This latter photon can be arbitrarily far away from the initial one. Quantum teleportation will be a critical ingredient for quantum computation networks.