QUANTUM TELEPORTATION THROUGH AN ENTANGLED STATE COMPOSED OF DISPLACED VACUUM AND SINGLE-PHOTON STATES
Podoshvedov S.A.

Received: July 18, 2007

PACS: 42.50.Dv, 03.67.Hk, 03.65.Ta

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We study the teleportation protocol of an unknown macroscopic qubit by means of a quantum channel composed of the displaced vacuum and single-photon states. The scheme is based on linear optical devices such as a beam splitter and photon number resolving detectors. A method based on conditional measurement is used to generate both the macroscopic qubit and entangled state composed from displaced vacuum and single-photon states. We show that such a qubit has both macroscopic and microscopic properties. In particular, we investigate the quantum teleportation protocol from a macroscopic object to a microscopic state.