标题： W 态在量子导引场景中的多部分纠缠和随机性认证实验 显示英文标题

标题： Experimental multipartite entanglement and randomness certification of the W state in the quantum steering scenario

摘要： 近期[Cavalcanti \textit{等} Nat Commun \textbf{6}, 7941 (2015)]提出了一种方法来验证非对称网络中纠缠的存在，在这种网络中，某些用户无法控制他们执行的测量。 这种不对称性在现实情况中自然出现，例如在量子网络上的加密协议中。 在这里，我们实现了这种“半设备无关”的技术，以实验方式观察三量子比特W态的所有类型的纠缠。 此外，我们分析了在这种情况下从三量子比特W态的任意二分之一可以认证的真实随机性的数量。 显示英文摘要

摘要： Recently [Cavalcanti \textit{et al.} Nat Commun \textbf{6}, 7941 (2015)] proposed a method to certify the presence of entanglement in asymmetric networks, where some users do not have control over the measurements they are performing. Such asymmetry naturally emerges in realistic situtations, such as in cryptographic protocols over quantum networks. Here we implement such "semi-device independent" techniques to experimentally witness all types of entanglement on a three-qubit photonic W state. Furthermore we analise the amount of genuine randomness that can be certified in this scenario from any bipartition of the three-qubit W state.