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

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 نشر من قبل Daniel Cavalcanti
 تاريخ النشر 2016
  مجال البحث فيزياء
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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.



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