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Communications in Theoretical Physics

Scheme for Teleportation of a Multipartite Quantum State by Using a Single Entangled Pair as Quantum Channel

Xin-Wen Wang, Zhiyong Wang, Li-Xin Xia

Published Feb 1, 2007• 12 citations
Publisher

Abstract

We present a theoretical scheme for perfect teleportation of an unknown multipartite two-level state by a single EPR (Einstein–Podolsky–Rosen) pair, and then generalize it to multilevel, i.e., an N -quNit state can be teleported by a single quNit entangled pair, with additional local unitary operations. The feature of the scheme is that teleporting a multipartite state with a reduced amount of entanglement costs less classical bits.

DOI
10.1088/0253-6102/47/2/014

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We present a theoretical scheme for perfect teleportation of an unknown multipartite two-level state by a single EPR (Einstein–Podolsky–Rosen) pair, and then generalize it to multilevel, i.e., an N -quNit state can be teleported by a single quNit entangled pair, with additional local unitary operations. The feature of the scheme is that teleporting a multipartite state with a reduced amount of entanglement costs less classical bits.
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A scheme to teleport an unknown two qubit state from Alice (the sender) to Bob (the receiver) using two Einstein Podolsky Rosen (EPR) pairs is presented, each EPR pair being shared by both Alice and Bob. Firstly, Alice combines each of the two particles in the teleported state with an EPR particle and makes Bell state measurement on each combination. Then she transmits the outcomes of her measurements to Bob classically. According to Alice′s measurement results, Bob can perform appropriate unitary operations on his two EPR particles to retrieve the initial state.