论文标题
容忍频道加密量子对话与集体噪音
Fault tolerant channel-encrypting quantum dialogue against collective noise
论文作者
论文摘要
在本文中，提出了针对集体噪声的两个容忍通道加密量子对话（QD）方案。一个是反对集体淘汰的噪声，而另一个是反对集体旋转噪声。无腐蚀的状态，每个状态由两个物理尺子组成，充当了打击集体噪声的行进状态。 Einstein-Podolsky-Rosen对扮演私人量子键的作用的Einstein-Podolsky-Rosen对在两个参与者之间在集体噪声渠道之间牢固地共享。通过使用私有量子密钥的加密和解密，两个参与者之间的每个行进两光逻辑量子量子的初始状态是私人共享的。由于每个行进逻辑值的初始状态的量子加密共享，因此克服了信息泄漏的问题。只要旋转角度正确选择，就可以在旋转后重复使用私钥，从而使量子资源得以节省。结果，他们的信息理论效率几乎高达66.7％。提出的QD协议仅需要单光子测量值，而不是用于量子测量的两光子关节测量值。安全分析表明，在对话过程中，窃听者无法获得有关秘密消息的任何有用的东西，而没有被发现。此外，可以在实验中使用当前技术实现所提出的QD协议。
In this paper, two fault tolerant channel-encrypting quantum dialogue (QD) protocols against collective noise are presented. One is against collective-dephasing noise, while the other is against collective-rotation noise. The decoherent-free states, each of which is composed of two physical qubits, act as traveling states combating collective noise. Einstein-Podolsky-Rosen pairs, which play the role of private quantum key, are securely shared between two participants over a collective-noise channel in advance. Through encryption and decryption with private quantum key, the initial state of each traveling two-photon logical qubit is privately shared between two participants. Due to quantum encryption sharing of the initial state of each traveling logical qubit, the issue of information leakage is overcome. The private quantum key can be repeatedly used after rotation as long as the rotation angle is properly chosen, making quantum resource economized. As a result, their information-theoretical efficiency is nearly up to 66.7%. The proposed QD protocols only need single-photon measurements rather than two-photon joint measurements for quantum measurements. Security analysis shows that an eavesdropper cannot obtain anything useful about secret messages during the dialogue process without being discovered. Furthermore, the proposed QD protocols can be implemented with current techniques in experiment.
