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

机译:双向受控量子隐形传态和使用五量子位纠缠态的安全直接通信

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摘要

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.
机译:提出了一种通过使用五量子位纠缠态作为量子通道来实现双向受控量子隐形传态(QT)的方案,其中Alice可以向Bob传输称为qubit A的任意单个量子位态,同时Bob也可以传输通过监督者Charlie的控制,给Alice提供了一个称为qubit B的任意单个qubit状态。根据我们的频道,我们明确显示了双向受控QT协议的工作方式。通过使用这种双向受控的隐形传态,尤其是双向受控量子安全直接通信(QSDC)协议,即;所谓的受控量子对话,将进一步研究。在确保量子通道安全的情况下,爱丽丝(Bob)直接在一系列量子位状态上编码秘密消息,然后将其发送给由查理(Charlie)监督的鲍勃(Alice)。特别地,携带秘密消息的量子位不需要在量子信道中发送。最后,我们证明了这种QSDC方案可能是确定的和安全的。

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