Two-way quantum teleportation controlled by a third party

Abstract

Abstract:

A scheme of two-way quantum teleportation controlled by a third party was proposed: two sides of communication (Alice and Bob) and the controller Charlie shared a six-qubit cluster state in advance. Firstly, Alice and Bob performed Bell-state measurements(BSMs) on parts of their qubit pairs respectively. If Charlie agreed them to communication, he should measure his qubits and announce their states. According to Charlie’s measured results, the two sides of communication performed some appropriately unitary transformations on their qubits respectively. Then they were able to reconstruct each other’s unknown state on their own qubits. The security of two-way communication has been improved because of the control of the third party.

Key words: quantum optics, two-way teleportation, Bell-state measurement, six-qubit cluster state, controlled by a third party

CLC Number:

TN918

ZOU Xin，YE Zhiqing. Two-way quantum teleportation controlled by a third party[J]. J4, 2012, 29(6): 683-687.

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