Verifying multipartite entanglement in semi-device independent settings.

Verifying multipartite entanglement in semi-device independent settings.

Seminar author:Will McCutcheon

Event date and time:11/12/2015 02:30:pm

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We’ll discuss an entanglement verification 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 distrustful parties and loss. The protocol remains secure against dishonest behavior 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, thus highlighting its potential for realistic quantum communication and networking applications. We will also discuss the challenges of constructing steering inequalities resistant to loss/postselection, and look at how entanglement, steerability and state fidelity can be quantified in this setting.