论文标题
放松量子的主要中继器的性能以及通用私人和独立位的安全内容
Relaxed bound on performance of quantum key repeaters and secure content of generic private and independent bits
论文作者
论文摘要
量子关键中继器是未来量子互联网的骨干。对于量子钥匙中继器的站点之间共享的任意混合的两分状态，这是一个开放的问题，可以在其两个最终节点之间生成多少密钥。我们对量子钥匙中继器速率进行了新颖的限制，该量子使用相对的熵距离，通常是纠缠量子状态。它使我们能够概括一下M. Christandl和R. Ferrara的主要中继器[Phys。莱特牧师。 119，220506]。界限（尽管不加紧）适用于更一般的州。反过来，我们表明，所谓的钥匙相关状态的重复键最多可以超过两倍的单向蒸馏纠缠，最多是其攻击版本纠缠的最大相关性熵的两倍。我们还对通用独立位的私人随机性数量提供了一个非平凡的上限。
Quantum key repeater is the backbone of the future Quantum Internet. It is an open problem for an arbitrary mixed bipartite state shared between stations of a quantum key repeater, how much of the key can be generated between its two end-nodes. We place a novel bound on quantum key repeater rate, which uses relative entropy distance from, in general, entangled quantum states. It allows us to generalize bound on key repeaters of M. Christandl and R. Ferrara [Phys. Rev. Lett. 119, 220506]. The bound, albeit not tighter, holds for a more general class of states. In turn, we show that the repeated key of the so called key-correlated states can exceed twice the one-way distillable entanglement at most by twice the max-relative entropy of entanglement of its attacked version. We also provide a non-trivial upper bound on the amount of private randomness of a generic independent bit.
