Hi all,
Tomorrow we will hear from Eloïc Vallée, who did his masters thesis in conjunction with the Brunner group in Geneva, on "mdiQKD with assumptions on the states overlap". See below for the abstract. We'll start at 2pm on zoom: https://ethz.zoom.us/j/362994444.
Best,
Joe
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Title: mdiQKD with assumptions on the states overlap
Abstract: With the upcoming generation of quantum computers, secure communications will essentially depend on quantum key distribution (QKD) algorithms. One of the most promising algorithm is the measurement-device-independent QKD (mdiQKD), first proposed by Lo, Curty and Qi in 2012. We explore a modified mdiQKD protocol with a relaxed assumption on the initial states. The assumption relies on the overlap between the states and not on the exact characterization of the states. The protocol is a tripartite prepare-and-measure based protocol. Two parties prepare states and send them to a connecting node, which performs a measurement on the joint states. And no assumption is made on the node's measurement. The protocol is therefore immune to attack on the third party. A secret key can be established by verifying the honesty of the measurement at the node through observed statistics. A positive key rate is found for different situations and demonstrates the protocol viability.