Pulsed energy-time entangled twin-photon source for quantum communication

Details Pulsed energy-time entangled twin-photon source for quantum communication Pulsed energy-time entangled twin-photon source for quantum communication

1998-09-11

arxiv.org/abs/quant-ph/9809034v1

Phys.Rev.Lett.82:2594-2597,1999

Physics

Quantum Physics

8 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.82.2594

A pulsed source of energy-time entangled photon pairs pumped by a standard laser diode is proposed and demonstrated. The basic states can be distinguished by their time of arrival. This greatly simplifies the realization of 2-photon quantum cryptography, Bell state analyzers, quantum teleportation, dense coding, entanglement swapping, GHZ-states sources, etc. Moreover the entanglement is well protected during photon propagation in telecom optical fibers, opening the door to few-photon applications of quantum communication over long distances.

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