Bidirectional controlled quantum teleportation and secure direct communication using five-qubit entangled state

Bidirectional controlled quantum teleportation and secure direct communication using five-qubit entangled state
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使用五量子位纠缠态的双向受控量子隐形传态和安全直接通信

DOI:
10.1007/s11128-013-0638-1
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发表时间:
2013-12
影响因子:
2.5
通讯作者:
王资生
王资生
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
王资生

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提出了一种利用五比特纠缠态作为量子信道实现双向受控量子隐形传态的方案,Alice可以向Bob发送一个称为量子比特A的任意单比特态,同时Bob也可以通过监督者Charlie的控制向Alice发送一个称为量子比特B的任意单比特态.基于我们的通道,我们明确地展示了双向控制QT协议是如何工作的。利用这种双向受控隐形传态,特别是提出了一种双向受控量子安全直接通信(QSDC)协议,所谓的受控量子对话,进一步研究。在保证量子信道安全的情况下,Alice(Bob)将秘密信息直接编码到一个量子比特态序列上,并在Charlie的监督下发送给Bob(Alice)。特别地,携带秘密信息的量子比特不需要在量子信道中传输。最后,我们证明了该QSDC方案是确定的和安全的。
A scheme is presented to implement bidirectional controlled quantum teleportation (QT) by using a five-qubit entangled state as a quantum channel, where Alice may transmit an arbitrary single qubit state called qubit A to Bob and at the same time, Bob may also transmit an arbitrary single qubit state called qubit B to Alice via the control of the supervisor Charlie. Based on our channel, we explicitly show how the bidirectional controlled QT protocol works. By using this bidirectional controlled teleportation, espcially, a bidirectional controlled quantum secure direct communication (QSDC) protocol, i.e., the so-called controlled quantum dialogue, is further investigated. Under the situation of insuring the security of the quantum channel, Alice (Bob) encodes a secret message directly on a sequence of qubit states and transmits them to Bob (Alice) supervised by Charlie. Especially, the qubits carrying the secret message do not need to be transmitted in quantum channel. At last, we show this QSDC scheme may be determinate and secure.
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