论文标题
使用随机量子状态的独立于设备的量子键分布
Device-Independent Quantum Key Distribution Using Random Quantum States
论文作者
论文摘要
我们统一生成各种等级的随机状态，并在基于纠缠的量子密钥分布（QKD）任务中研究其性能。特别是，我们分析了随机双质量状态在实现与设备无关（DI）QKD中的疗效。我们首先找到纠缠和钟形非端口的归一化分布，这是di-qkd的关键资源，用于从等级-1到等级4的随机状态。随着等级的增加，纠缠和钟形的非局部状态的数量减少。我们观察到，与量子资源的降低相比，降低安全率的降低更为明显。我们发现，纯状态和沃纳州分别以所有混合双Quibent状态的最低安全密钥速率分别提供上限和下限，在一般情况下以及最佳的集体攻击策略下具有相同范围的纠缠幅度。
We Haar uniformly generate random states of various ranks and study their performance in an entanglement-based quantum key distribution (QKD) task. In particular, we analyze the efficacy of random two-qubit states in realizing device-independent (DI) QKD. We first find the normalized distribution of entanglement and Bell-nonlocality which are the key resource for DI-QKD for random states ranging from rank-1 to rank-4. The number of entangled as well as Bell-nonlocal states decreases as rank increases. We observe that decrease of the secure key rate is more pronounced in comparison to that of the quantum resource with increase in rank. We find that the pure state and Werner state provide the upper and lower bound, respectively, on the minimum secure key rate of all mixed two-qubit states possessing the same magnitude of entanglement under general as well as optimal collective attack strategies.
