Jennewein T, Simon C, Weihs G, Weinfurter H, Zeilinger A
Institut fur Experimentalphysik, Universitat Wien, Boltzmanngasse 5, A-1090 Wien, Austria.
Phys Rev Lett. 2000 May 15;84(20):4729-32. doi: 10.1103/PhysRevLett.84.4729.
By realizing a quantum cryptography system based on polarization entangled photon pairs we establish highly secure keys, because a single photon source is approximated and the inherent randomness of quantum measurements is exploited. We implement a novel key distribution scheme using Wigner's inequality to test the security of the quantum channel, and, alternatively, realize a variant of the BB84 protocol. Our system has two completely independent users separated by 360 m, and generates raw keys at rates of 400-800 bits/s with bit error rates around 3%.
通过实现基于偏振纠缠光子对的量子密码系统，我们建立了高度安全的密钥，这是因为近似实现了单光子源并利用了量子测量固有的随机性。我们使用维格纳不等式实现了一种新颖的密钥分发方案来测试量子信道的安全性，或者实现了BB84协议的一个变体。我们的系统有两个完全独立的用户，相距360米，以400 - 800比特/秒的速率生成原始密钥，误码率约为3%。
