Quantum cryptography with entangled photons
Quantum cryptography with entangled photons
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DOI：
10.1103/physrevlett.84.4729
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发表时间：
2000-05-15
影响因子：
8.6
通讯作者：
Zeilinger, A
中科院分区：
文献类型：
--
作者：
Jennewein, T;Simon, C;Zeilinger, A
通过实现一个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，因为一个单光子源的近似和量子测量的固有随机性被利用。我们实现了一种新的密钥分配方案，使用Wigner不等式来测试量子信道的安全性，或者，实现BB84协议的变体。我们的系统有两个完全独立的用户，相距360 m，以400-800 bits/s的速率生成原始密钥，误码率约为3%。
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%.