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Journal of Minjiang University

Teleportation of a three-particle entangled GHZ-state through cavity QED

Hong Hai-lian

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

A deterministic teleportation of an arbitrary three-particle entangled GHZ state is suggested based on the cavity QED techniques.The distinct advantage of the present scheme is that the Bell-state measurement is not required,that the effects of thermal field and cavity delay can be eliminated,that the probability of success is 1.0,and the fidelity is 1.0.

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A deterministic teleportation of an arbitrary three-particle entangled GHZ state is suggested based on the cavity QED techniques.The distinct advantage of the present scheme is that the Bell-state measurement is not required,that the effects of thermal field and cavity delay can be eliminated,that the probability of success is 1.0,and the fidelity is 1.0.
We have investigated the problem of teleporting a three-atom entangled W state and propose two schemes based on entanglement swapping to complete the teleportation. We put forward the first scheme for the teleportation of W state by using an EPR pair and a GHZ state via vacuum cavities, the second scheme for teleporting W state by using two EPR pairs as quantum channels and introducing an addition atom via thermal cavities. Further more, the distinct advantage of the present schemes are that the Bell-state measurement is not required. The effects of cavity decay and thermal field are all eliminated.
We propose a scheme for the teleportation of an unknown two-particle entangled EPR state without the Bell-state measurement.Alice needs to teleport an unknown two-particle EPR state to Bob.Her atoms and Bob's are prepared in the maximal entangled GHZ state,which forms the quantum channel.She sends two atoms through a single-mode cavity field,and drives them by a strong classical field at the same time.Throngh the interaction between the atoms and the cavity,the states of these atoms are evolved.After the interaction,Alice realizes the teleportation successfully.In the scheme,the effects of thermal field and cavity decay are all eliminated.The success probability is 1.0,and the fidelity is 1.0 too.
We propose a scheme for the teleportation of an arbitrary two-atom entangled state |ϕ〉12 = a|gg〉12 + b|ge〉12 + c|eg〉12 + d|ee〉12 in driven QED. Two pairs of maximally two-atom entangled state are required as the quantum channel. This scheme does not involve apparent (or direct) Bell-state measurement and is insensitive to the cavity decay and the thermal field. Meanwhile this approach can be used to teleport the unknown multipartite GHZ state. The probability of success in our scheme can reach 1.0.