基于广义双模薛定谔猫态的设备无关量子密钥分发
Device-independent quantum key distribution with generalized two-mode Schrödinger cat states
摘要：
我们展示了如何弱非线性可以用于设备无关的量子密钥分发（QKD）协议使用广义双模薛定谔猫态。因此，QKD协议被证明是安全的，对集体攻击和一些相干攻击。我们推导出了无噪声有损玻色子信道中贝尔参数、量子误码率和设备无关密钥速率的最佳值的解析公式。此外，我们给出了实现这些最佳值的滤波器和测量。我们发现，在这个信道中的任何距离的量子误码率是相同的零，在原则上，和协议中的状态总是能够违反一个贝尔不等式。该协议被发现是优越的，在某些制度的设备无关的量子密钥分配协议的基础上偏振纠缠态在去偏振信道。最后，我们提出了一个实现的最佳滤波器和测量。
英文摘要：
We show how weak non-linearities can be used in a device-independent quantum key distribution (QKD) protocol using generalized two-mode Schrödinger cat states. The QKD protocol is therefore shown to be secure against collective attacks and for some coherent attacks. We derive analytical formulas for the optimal values of the Bell parameter, the quantum bit error rate, and the device-independent secret key rate in the noiseless lossy bosonic channel. Additionally, we give the filters and measurements which achieve these optimal values. We find that over any distance in this channel the quantum bit error rate is identically zero, in principle, and the states in the protocol are always able to violate a Bell inequality. The protocol is found to be superior in some regimes to a device-independent QKD protocol based on polarization entangled states in a depolarizing channel. Finally, we propose an implementation for the optimal filters and measurements.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
