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Communications in Theoretical Physics

Teleportation of n -Particle State via n Pairs of EPR Channels

Min Cao, Zhu Shi-Qun, Fang Jian-Xing

Published May 15, 2004• 37 citations
Publisher

Abstract

The teleportation of an arbitrary n -particle state is proposed if n pairs of identical EPR states are utilized as quantum channels. Independent Bell state measurements are performed for joint measurement. By using a special Latin square of order , explicit expressions of outcomes after the Bell state measurements by Alice (sender) and the corresponding unitary transformations by Bob (receiver) can be derived. It is shown that the teleportation of n -particle state can be implemented by a series of single-qubit teleportation.

DOI
10.1088/0253-6102/41/5/689

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The teleportation of an arbitrary n -particle state is proposed if n pairs of identical EPR states are utilized as quantum channels. Independent Bell state measurements are performed for joint measurement. By using a special Latin square of order , explicit expressions of outcomes after the Bell state measurements by Alice (sender) and the corresponding unitary transformations by Bob (receiver) can be derived. It is shown that the teleportation of n -particle state can be implemented by a series of single-qubit teleportation.
The teleportation of an arbitrary n-particle state (n ≥ 1) is proposed if n pairs of identical EPR states are utilized as quantum channels. Independent Bell state measurements are performed for joint measurement. By using a special Latin square of order 2n(n ≥ 1), explicit expressions of outcomes after the Bell state measurements by Alice (sender) and the corresponding unitary transformations by Bob (receiver) can be derived. It is shown that the teleportation of n-particle state can be implemented by a series of single-qubit teleportation.
A scheme for teleportation of n-particle arbitrary states via n pairs of EPR states is proposed.In the scheme,we discovered the internal relationship between the result of Alice's measurement and the unitary transformation performed by Bob(the receiver),and the corresponding expressions were described.Thus when Bob receiving the result of Alice' Bell measurement,he can ascertain immediately the corresponding unitary transformation he must performed in order to implement the teleportation protocol,which is particularly important for the case that n is very large.
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.