Faithful Teleportation with Genuine Multipartite Entanglement
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چکیده
In this letter we present an explicit protocol B2 for faithfully teleporting an arbitrary 2-qubit state with a class of 4-qubit entangled states. We construct these states in a way different from that of Yeo and Chua [Phys. Rev. Lett. 94, 060502 (2006)]. We will show that the genuine states presented by Yeo and Chua are only a subset of our entangled states. The generalizations of the protocol B2 to general protocols Bn and Dn, i.e., teleporting an arbitrary n-qubit or n-qudit state by using the genuine 2n-qubit or 2n-qudit entangled states we construct, are also sketched. No-cloning theorem forbids a perfect copy of an arbitrary unknown quantum state. How to interchange different resources has ever been a question in quantum computation and quantum information. In 1993, Bennett et al.[1] first presented a quantum teleportation scheme T0. In the scheme, an arbitrary unknown quantum state in Alice’s qubit can be teleported to a distant qubit B with the aid of Einstein-PodolskyRosen (EPR) pair. Suppose Alice has a qubit x in an arbitrary unknown normalized state |Λ〉x = α|0〉x + β|1〉x, (1) where α and β are complex. Alice and a remote Bob share an EPR pair (a, b), say, in the state
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تاریخ انتشار 2006