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Communications in Theoretical Physics

Generation of a Four-Particle Cluster State and Perfect Teleportation of an Arbitrary Two-Particle State in an Ion-Trap System

Xin-Wen Wang, Guojian Yang

Published Oct 1, 2009• 8 citations
Publisher

Abstract

We propose a scheme for generating a four-particle cluster state in an ion-trap system. The scheme is insensitive to the thermal motion of the ions, and needs less operations than previous ones. With such a setup, we also demonstrate a procedure for perfectly teleporting an arbitrary two-particle state via a single multipartite entanglement channel, a four-particle cluster state.

DOI
10.1088/0253-6102/52/4/06

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The Journal of Atomic and Molecular Sciences•Aug 24, 2011•1 citation
We propose a scheme for generating a four-particle cluster state in an ion-trap system. The scheme is insensitive to the thermal motion of the ions, and needs less operations than previous ones. With such a setup, we also demonstrate a procedure for perfectly teleporting an arbitrary two-particle state via a single multipartite entanglement channel, a four-particle cluster state.
We propose an effective scheme for the entanglement concentration of a four-particle state via entanglement swapping in an ion trap. Taking the maximally entangled state after concentration as a quantum channel, we can faithfully and determinatively teleport quantum entangled states from Alice to Bob without the joint Bell-state measurement. In the process of constructing the quantum channel, we adopt entanglement swapping to avoid the decrease of entanglement during the distribution of particles. Thus our scheme provides a new prospect for quantum teleportation over a longer distance. Furthermore, the success probability of our scheme is 1.0.
This paper proposes two schemes for teleporting a product state of an arbitrary single-particle state from a sender to a receiver via a four-particle entangled cluster state. The two different quantum channels are used, while the successful probabilities of these two schemes are different. In the first proposal, the successful probability is 1.0 and in the second proposal, the successful probability is 4q24q^24q2 if the receiver performs an appropriate unitary operation.