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Journal of Anhui University

Scheme for deterministic quantum teleportation of four-atom entanglement general W state

Qun Yang

Published Jan 1, 2008• 0 citations
OpenAlex

Abstract

A deterministic teleportation scheme for four-atom entanglement general W state was proposed in cavity QED.In our scheme,the Bell state measurement could be exactly converted into two separate atomic measurements on the two involved atoms,thus by only single-qubit measurements one can fulfill the scheme.The success probability could reach 1.0.In addition,the scheme was insensitive to both the cavity decay and the thermal field.

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A deterministic teleportation scheme for four-atom entanglement general W state was proposed in cavity QED.In our scheme,the Bell state measurement could be exactly converted into two separate atomic measurements on the two involved atoms,thus by only single-qubit measurements one can fulfill the scheme.The success probability could reach 1.0.In addition,the scheme was insensitive to both the cavity decay and the thermal field.
Quantum teleportation plays a crucial role in quantum information science to date,lots of schemes have been proposed for teleportation.However,in practice,there are many difficulties,such as: the preparation of EPR pairs,the joint Bell measurement,the effects of thermal field and cavity decay.In this(paper),we introduce a single-mode cavity,where the maximally entangled states of atoms 4,5,atoms 6,7,and atoms 8,9 could be prepared,from the form of the effective Hamiltonian.The effects of thermal field and cavity decay are all eliminated.Futhermore,we propose a scheme for teleportation of an unknown tripartite W state in cavity QED.We find that the joint Bell measure is not necessary,and the total success probability can reach 1 in the teleportation process.