Schiavon Matteo, Vallone Giuseppe, Villoresi Paolo
Dipartimento di Ingegneria dell'Informazione, Università di Padova, via Venezia 15, 35131 Padova, Italy.
Istituto di Fotonica e Nanotecnologie, CNR, Padova, Italy.
Sci Rep. 2016 Jul 28;6:30089. doi: 10.1038/srep30089.
Quantum key distribution using three states in equiangular configuration combines a security threshold comparable with the one of the Bennett-Brassard 1984 protocol and a quantum bit error rate (QBER) estimation that does not need to reveal part of the key. We implement an entanglement-based version of the Renes 2004 protocol, using only passive optic elements in a linear scheme for the positive-operator valued measure (POVM), generating an asymptotic secure key rate of more than 10 kbit/s, with a mean QBER of 1.6%. We then demonstrate its security in the case of finite key and evaluate the key rate for both collective and general attacks.
采用等角配置下三态的量子密钥分发，结合了与1984年贝内特 - 布拉萨德协议相当的安全阈值以及无需泄露部分密钥的量子比特误码率（QBER）估计。我们实现了基于纠缠的2004年雷内斯协议版本，在用于正定算符值测量（POVM）的线性方案中仅使用无源光学元件，产生了超过10 kbit/s的渐近安全密钥率，平均QBER为1.6%。然后我们在有限密钥情况下证明了其安全性，并评估了集体攻击和一般攻击下的密钥率。
