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Communications in Theoretical Physics

Two-Qubit Logic Gates and Teleportation of an Entangled State of Atom-Cavity with Cavity QED

Ai-Xi Chen, Huang Ke-Lin, Li Deng

Published Oct 1, 2007• 1 citation
Publisher

Abstract

In this paper, a scheme is proposed for realization of two-qubit controlled-not gates and teleportation of an entangled state of atom-cavity. In this scheme, applying hyperfine levels of atom, we consider Λ-type three-level atom interacting resonantly or nonresonantly with cavity field that is prepared in σ − polarized. We consider the experimental feasibility of this scheme and compare our results with other schemes.

DOI
10.1088/0253-6102/48/4/014

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In this paper, a scheme is proposed for realization of two-qubit controlled-not gates and teleportation of an entangled state of atom-cavity. In this scheme, applying hyperfine levels of atom, we consider Λ-type three-level atom interacting resonantly or nonresonantly with cavity field that is prepared in σ − polarized. We consider the experimental feasibility of this scheme and compare our results with other schemes.
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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.
We have proposed an alternative scheme for teleportation of two-atom entangled state in cavity QED. It is based on the degenerate Raman interaction of a single-mode cavity field with a ∧-type three-level atom. The prominent feature of the scheme is that only one cavity is required, which is prior to the previous one. Moreover, the atoms need to be detected are reduced compared with the previous scheme. The experimental feasibility of the scheme is discussed. The scheme can easily be generalized for teleportation of N -atom GHZ entangled states. The number of the atoms needed to be detected does not increase as the number of the atoms in GHZ state increases.