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Chinese Journal of Quantum Electronics

Teleportation of a three-particle W state without the Bell-state measurement

Rong‐Can Yang

Published Jan 1, 2006• 0 citations
OpenAlex

Abstract

We propose a scheme for teleportation of an unknown three-atom W state without the Bell-state measurement. Firstly, we prepare an unknown three-atom W state by the resonant interaction between the atoms and the cavity. Then a quantum channel is prepared by sending two atoms through a single-mode cavity field, and driving them by a strong classical field at the same time. During the interaction between the atoms and the cavity, the states of these atoms are evolved. After the interaction, we prepare the EPR states, which form the quantum channel. Finally, we implement the teleportation of the unknown three-atom W state using the way of preparing the quantum channel. During the teleportation, the effects of thermal field and cavity decay are all eliminated. The success probability is 1.0.

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We propose a scheme for teleportation of an unknown three-atom W state without the Bell-state measurement. Firstly, we prepare an unknown three-atom W state by the resonant interaction between the atoms and the cavity. Then a quantum channel is prepared by sending two atoms through a single-mode cavity field, and driving them by a strong classical field at the same time. During the interaction between the atoms and the cavity, the states of these atoms are evolved. After the interaction, we prepare the EPR states, which form the quantum channel. Finally, we implement the teleportation of the unknown three-atom W state using the way of preparing the quantum channel. During the teleportation, the effects of thermal field and cavity decay are all eliminated. The success probability is 1.0.
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.
A scheme for teleportation of an unknown three-atom entangled W state is proposed,in which a cluster state of four identical two-level atoms is used as quantum channel.It is proved that,an arbitrary three-atom entangled W state can be teleported perfectly by introducing an additional atom and performing a collective unitary transformation as well as appropriate single-atom unitary transformations on the receiver's side based on the classical information of the sender.In the scheme,the effects of the thermal field and the cavity decay are eliminated.Furthermore,the Bell measurements are not needed,and the successful probability of teleportation is 1.
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.
Quantum teleportation of two qubits based on One-to-Many without the Bell-state measurement is proposed.In the scheme of teleportation,(2n+2)-particle entanglement is required as the quantum channel.The teleportation can be realized by sending atoms into a single-mode cavity which is driven by a strong classical field at the same time.During the interaction of the atoms with the cavity,the states of these atoms evolve.The scheme immunes the effects of thermal field and cavity decay.The success probability is 1.0.
Time evolution of state vector of the system of V-type three-level-atom interacting with two-mode 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.