Experimental verification of multipartite entanglement in quantum networks.
Experimental verification of multipartite entanglement in quantum networks.
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DOI:
10.1038/ncomms13251
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发表时间:
2016-11-09
影响因子:
16.6
通讯作者:
Tame, M. S.
中科院分区:
文献类型:
--
作者:
McCutcheon, W.;Pappa, A.;Bell, B. A.;McMillan, A.;Chailloux, A.;Lawson, T.;Mafu, M.;Markham, D.;Diamanti, E.;Kerenidis, I.;Rarity, J. G.;Tame, M. S.
Multipartite entangled states are a fundamental resource for a wide range of quantum information processing tasks. In particular, in quantum networks, it is essential for the parties involved to be able to verify if entanglement is present before they carry out a given distributed task. Here we design and experimentally demonstrate a protocol that allows any party in a network to check if a source is distributing a genuinely multipartite entangled state, even in the presence of untrusted parties. The protocol remains secure against dishonest behaviour of the source and other parties, including the use of system imperfections to their advantage. We demonstrate the verification protocol in a three- and four-party setting using polarization-entangled photons, highlighting its potential for realistic photonic quantum communication and networking applications. Multipartite entangled states are a fundamental resource for quantum information processing tasks; it is thus important to verify their presence. Here the authors present and demonstrate a protocol that allows any party in a network to verify if an untrusted source is distributing multipartite entangled states.
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