Controlled Quantum Secure Direct Communication by?Using Four Particle Cluster States |
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Authors: | Ling-Ling Zhang You-Bang Zhan Qun-Yong Zhang |
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Abstract: | We present a controlled quantum secure direct communication protocol by using cluster states via swapping quantum entanglement and local unitary operation. In the present scheme, the sender transmit the secret message to the receiver directly and the secret message can only be recovered by the receiver under the permission of the controller. |
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