BEGIN:VCALENDAR VERSION:2.0 PRODID:Icfo X-PUBLISHED-TTL:P1W BEGIN:VEVENT UID:69d25644ee9c2 DTSTART:20221111T140000Z SEQUENCE:0 TRANSP:OPAQUE DTEND:20221111T150000Z LOCATION:Blue Lecture Room SUMMARY:ICFO | ALEXANDER STRELTSOV CLASS:PUBLIC DESCRIPTION:Many applications of the emerging quantum technologies\, such a s quantum teleportation and quantum key distribution\, require singlets\, maximally entangled states of two quantum bits. It is thus of utmost impor tance to develop optimal procedures for establishing singlets between remo te parties. As has been shown very recently\, singlets can be obtained fro m other quantum states by using a quantum catalyst\, an entangled quantum system which is not changed in the procedure. We put this idea further\, i nvestigating properties of entanglement catalysis and its role for quantum communication. For transformations between bipartite pure states we prove the existence of a universal catalyst\, which can enable all possible tra nsformations in this setup. We demonstrate the advantage of catalysis in a symptotic settings\, going beyond the typical assumption of independent an d identically distributed systems. We further develop methods to estimate the number of singlets which can be established via a noisy quantum channe l when assisted by entangled catalysts. For various types of quantum chann els our results lead to optimal protocols\, allowing to establish the maxi mal number of singlets with a single use of the channel.\n \;\nBio Ale xander Streltsov\, Centre of New Technologies\, University of Warsaw\, Pol and Alexander Streltsov received his PhD in Physics from the University o f Dü\;sseldorf in 2013. The research during his PhD was awarded with a prize for the best dissertation from the German Physical Society. In the years 2013-2017 he was Humboldt Fellow at ICFO\, and at Freie Universit&au ml\;t Berlin\, Germany. In 2017-2018 he was principal investigator of his own project at Gdańsk University of Technology\, Poland. Since December 2 018 he is Group Leader at the Centre of New Technologies\, University of W arsaw\, Poland. DTSTAMP:20260405T123204Z END:VEVENT END:VCALENDAR