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理论物理通讯：英文版

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

Xin Wang

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

We present a theoretical scheme for perfect telcportation 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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Scheme for Teleportation of a Multipartite Quantum State by Using a Single Entangled Pair as Quantum Channel

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我们在场为由单个 EPR 的一个未知多国参加的二水平的状态的完美的远距传物的一个理论计划(爱因斯坦—Podolsky—Rosen ) 配对，然后概括它多铺平，即，一个 N-quNit 状态能是由单个 quNit 的 teleportcd 纠缠的对，与另外的本地单一的操作。计划的特征是与纠纷的减少的数量移植一个多国参加的状态的电视花去更少古典位。

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In quantum information, qubits were always in superposition states, so how to teleport a multi - qubit state was an important problem. A scheme was proposed which can teleport N - qubit quantum state by means of Einstein - Podolsky - Rosen (EPR) pairs. All of the operations of the scheme was local and within the reach of current technology. This scheme can teleport more information than using singlet particle quantum state .

•Jan 1, 2004•0 citations
We present a theoretical scheme for perfect telcportation 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.
A simple scheme for teleporting an unknown M-qubit cat-like state is proposed. The steps of this scheme can be summarized simply: disentangle-teleport-reconstruct entanglement. If proper unitary operations and measurements from senders are given, the teleportation of an unknown M-qubit cat-like state can be converted into single qubit teleportation. In the meantime, the receiver should also carry out right unitary operations with the introduction of appropriate ancillary qubits to confirm the successful teleportation of the demanded entangled state. The present scheme can be generalized to teleport an unknown M-quNit state, i.e., an M-quNit state can be teleported by a single quNit entangled pair.
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.