Marcikic I, de Riedmatten H, Tittel W, Zbinden H, Legré M, Gisin N
Group of Applied Physics-Optique, University of Geneva, CH-1211 Geneva 4, Switzerland.
Phys Rev Lett. 2004 Oct 29;93(18):180502. doi: 10.1103/PhysRevLett.93.180502. Epub 2004 Oct 28.
We report experimental distribution of time-bin entangled qubits over 50 km of optical fibers. Using actively stabilized preparation and measurement devices we demonstrate violation of the Clauser-Horne-Shimony-Holt Bell inequality by more than 15 standard deviations without removing the detector noise. In addition we report a proof-of principle experiment of quantum key distribution over 50 km of optical fibers using entangled photon.
我们报告了时间-bin纠缠量子比特在50公里光纤上的实验分布情况。使用主动稳定的制备和测量设备，我们在未消除探测器噪声的情况下，证明了对克劳泽-霍恩-希莫尼-霍尔特贝尔不等式的违反超过15个标准差。此外，我们还报告了一个使用纠缠光子在50公里光纤上进行量子密钥分发的原理验证实验。
