S BOSE¹, P L KNIGHT², M B PLENIO² and V VEDRAL²

² Optics Section, The Blackett Laboratory, Imperial College, London SW7 2BZ, England

Abstract.

We present a rare example of a decay mechanism playing a constructive role in quantum information processing. We show how the state of an atom trapped in a cavity can be teleported to a second atom trapped in a distant cavity by the joint detection of photon leakage from the cavities. The scheme, which is probabilistic, requires only a single three level atom in a cavity. We also show how this scheme can be modified to a teleportation with insurance.

Keywords: Teleportation; cavity; decay; entanglement.

Pacs Nos. 03.67.-a; 03.65.Bz; 42.50.-p; 42.50.Vk