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Chinese Physics Letters

Teleportation of a Superposition of Three Orthogonal States of an Atom without Bell-State Measurement

Zhong Zhi-Rong

Published May 1, 2008• 1 citation
Publisher

Abstract

A scheme to teleport a superposition of three orthogonal states of an atom without Bell-state measurement in cavity QED is proposed. The scheme based on the resonant interaction of two Λ-type three-level atoms with a bimodal cavity. The detection of atom a collapses atom b to the initial state of atom a with cavity mode left in two-mode vacuum state. The probability of success and the fidelity of this scheme are 0.112 and 0.999, respectively.

DOI
10.1088/0256-307x/25/5/045

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A scheme to teleport a superposition of three orthogonal states of an atom without Bell-state measurement in cavity QED is proposed. The scheme based on the resonant interaction of two Λ-type three-level atoms with a bimodal cavity. The detection of atom a collapses atom b to the initial state of atom a with cavity mode left in two-mode vacuum state. The probability of success and the fidelity of this scheme are 0.112 and 0.999, respectively.
An alternative scheme is proposed for teleportation of an unknown atomic-entangled state. The scheme is based on the resonant interaction of a two-mode cavity field with a Λ-type three-level atom. In contrast with the previously proposed scheme of [Commun. Theor. Phys. 47 (2007) 253], the present scheme is ascendant, since the fidelity is 1.0 in principle similarly without the Bell-state measurement. The scheme may be generalized to not only the teleportation of the cavity-mode-entangled-state but also the teleportation of the multi-atomic entangled states included in generalized GHZ states. And the scheme is experimentally feasible based on the current cavity QED technique.
The interaction of V-type three-level atom with two-mode cavity field is described and the interaction formula between atom and cavity field is obtained.An alternative scheme is proposed for teleportation of an unknown atomic-entangled state without the Bell-state measurement.The scheme is based on the resonant interaction of V-type three-level-atom with two-mode cavity field.By means of selective measurement on the atom to be teleported state,it follows that the teleportation of an unknown atomic-entangled state is realized.And the scheme is experimentally feasible based on the current cavity QED technique and the success probability is 1/16.