Jiangxi kexue

Controlled Quantum Communication of an Unknown Two-Qubit Entangled State

Wang Zuo-don

Published Jan 1, 2014• 0 citations

Abstract

A scheme of multi-party controlled quantum communication of an unknown two-qubit entangled state by using a seven-qubit cluster state as the quantum channel is proposed. In the scheme, the sender set a controller,the controller can not receive the unknown two-qubit entangled state,but he can help the receiver reconstruct the unknown state with the sender. The sender needs to perform a joint von-Neumann measurement on her four qubits,and the controller measures his qubit in the computational basis. The receiver according to the results of two measurement can reconstruct the unknown state by performing appropriate unitary operations. We can set the number of the receiver,and they are constrained by the controller,so as to realize multi-party controlled quantum communication.

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