Multiuser-to-multiuser entanglement distribution based on 1550 nm polarization-entangled photons  

作　　者：Dong-Yang Cao 

机构地区：[1]Key Laboratory of Quantum Information, University of Scienceand Technology of China, Chinese Academy of Sciences,Hefei 230026, China [2]Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China

出　　处：《Science Bulletin》2015年第12期1128-1132,I0003,共6页科学通报（英文版）

基　　金：This work was supported by the National Nat- ural Science Foundation of China （61327901, 61490711, 11274289, 11325419, 11374288 and 11104261）, the National Basic Research Program of China （2011CB921200）, the Strategic Priority Research Program （B） of the Chinese Academy of Sciences （XDB01030300）, the National Science Ftmd for Distinguished Young Scholars （61225025）, and the Fundamental Research Funds for Central Universities （WK2470000011）.

摘　　要：Telecom-band polarization-entangled photon- pair source has been widely used in quantum communi- cation due to its acceptable transmission loss. It is also used in cooperation with wavelength-division multiplexing （WDM） to construct entanglement distributor. However, previous schemes generally are not suitable for multinode scenario. In this paper, we construct a telecom-band po- larization-entangled photon-pair source, and it shows ul- trahigh fidelity and concurrence which are both greater than 90 % （raw data）. Moreover, we set up a four-by-four entanglement distributor based on WDM. We check the 16 Clauser-Horne-Shimony-Holt inequalities, which show nonlocality. Lastly, as an example of practical application of this source, we estimate the quantum bit error rates and quantum secret key rates when it is used in quantum key distribution. Furthermore, the transmission of entanglement in long optical fibers is also demonstrated.电信乐队纠缠极化的光子对来源广泛地由于它的可接受的传播损失在量通讯被使用了。构造纠纷分发者也与波长部门 multiplexing (WDM ) 在合作被使用。然而，以前的计划通常不对 multinode 情形合适。在这份报纸，我们构造一个电信乐队纠缠极化的光子对来源，和它出现超离频两个都比 90 大的忠实和同时发生 ?%( 未加工的数据) 。而且，我们基于 WDM 建立了一个 four-by-four 纠纷经销商。我们检查 16 ClauserHorneShimonyHolt 不平等，它显示出 nonlocality。作为这来源的实际申请的一个例子，最后，我们估计当它在量钥匙分发被使用时，量位错误率和量秘密给率调音。而且，在长光的纤维的纠纷的传播也被表明。

关 键 词：Entanglement distribution MULTIUSER Telecom-band 

分 类 号：TN918[电子电信—通信与信息系统] O413.1[电子电信—信息与通信工程]