本文關(guān)鍵詞：多用戶到多用戶的通訊波段糾纏光子分發(fā)（英文）

  更多相關(guān)文章： Entanglement distribution Multiuser Telecom-band

【摘要】：Telecom-band polarization-entangled photonpair source has been widely used in quantum communication 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 polarization-entangled photon-pair source, and it shows ultrahigh 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 16Clauser 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 entanglemen in long optical fibers is also demonstrated.
【作者單位】： Key
【關(guān)鍵詞】： Entanglement distribution Multiuser Telecom-band
【基金】：supported by the National Natural 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 Fund for Distinguished Young Scholars(61225025) the Fundamental Research Funds for Central Universities(WK2470000011)
【分類號(hào)】：O413.1;TN918
【正文快照】： 1 IntroductionQuantum entanglement is a potential resource for manyquantum information processes,such as quantum communi-cation[1],quantum dense coding[2],quantum cryptographybased on entanglement[3,4],and quantum teleportation[5].Quantum entanglement in

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