论文标题
使用量较少的量子状态
Reference-Frame-Independent, Measurement-Device-Independent quantum key distribution using fewer quantum states
论文作者
论文摘要
独立于参考框架的量子密钥分布（RFI-QKD）提供了一种实用方法，可以在两个远程党之间生成秘密密钥而不共享共同的参考框架。另一方面，与测量设备无关的QKD（MDI-QKD）具有高水平的安全性，因为它可以抵抗所有量子黑客攻击尝试的测量设备。这两个QKD协议（即RFI-MDI-QKD）的组合是最引人入胜的QKD协议之一，因为它既具有实用性和安全性。为了进一步实用RFI-MDI-QKD，降低实施复杂性是有益的。在这里，我们已经证明，RFI-MDI-QKD可以使用其原始提案的量子状态少。我们发现，原则上，当事方之一的量子状态数量可以从六个减少到三个，而不会损害安全性。与传统的RFI-MDI-QKD相比，双方应传输六个量子状态，它大大简化了QKD协议的实现。我们还通过原理实验验证了该方案的可行性。
Reference-Frame-Independent Quantum Key Distribution (RFI-QKD) provides a practical way to generate secret keys between two remote parties without sharing common reference frames. On the other hand, Measurement-Device-Independent QKD (MDI-QKD) offers high level of security as it immunes against all the quantum hacking attempts to the measurement devices. The combination of these two QKD protocols, i.e., RFI-MDI-QKD, is one of the most fascinating QKD protocols since it holds both advantages of practicality and security. For further practicality of RFI-MDI-QKD, it is beneficial to reduce the implementation complexity. Here, we have shown that RFI-MDI-QKD can be implemented using fewer quantum states than those of its original proposal. We found that, in principle, the number of quantum states for one of the parties can be reduced from six to three without compromising security. Comparing to the conventional RFI-MDI-QKD where both parties should transmit six quantum states, it significantly simplifies the implementation of the QKD protocol. We also verify the feasibility of the scheme with the proof-of-principle experiment.
