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Journal of Dezhou University

Multi-qubit quantum teleportation state via EPR pairs

Yongliang Liu

Published Jan 1, 2004• 0 citations
OpenAlex

Abstract

In this paper,a scheme was proposed which can teleport N-qubit quantum state by means of nEinstein-Podolsky-Rosen(EPR)pairs.In the proposed scheme,entangled EPR state is used as quantum channel between a sender and a receiver,the teleportaion of N-qubit unknown quantum state can be realized by means of N joint measurement and relevant unitary transformation.This scheme can teleport more information than using singlet particle quantum state.

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Communications in Theoretical Physics•Aug 1, 2008•1 citation
In this paper,a scheme was proposed which can teleport N-qubit quantum state by means of nEinstein-Podolsky-Rosen(EPR)pairs.In the proposed scheme,entangled EPR state is used as quantum channel between a sender and a receiver,the teleportaion of N-qubit unknown quantum state can be realized by means of N joint measurement and relevant unitary transformation.This scheme can teleport more information than using singlet particle quantum state.
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.
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 multi-sender-controlled quantum teleportation scheme is proposed to teleport several secret quan- tum states from different senders to a distance receiver based on only one Einstein-Podolsky-Rosen (EPR) pair with controlled-NOT (CNOT) gates. In the present scheme, several secret single-qubit quantum states are encoded into a multi-qubit entangled quantum state. Two communication modes, i.e., the detecting mode and the message mode, are employed so that the eavesdropping can be detected easily and the teleported message may be recovered efficiently. It has an advantage over teleporting several different quantum states for one scheme run with more efficiency than the previous quantum teleportation schemes. PACS numbers: 03.67.Dd, 03.65.Ud