{"id":2132,"date":"2023-07-24T11:09:37","date_gmt":"2023-07-24T09:09:37","guid":{"rendered":"https:\/\/webs.uab.cat\/giq\/?post_type=seminar&#038;p=2132"},"modified":"2023-07-24T11:09:37","modified_gmt":"2023-07-24T09:09:37","slug":"decoupling-by-local-random-unitaries-without-simultaneous-smoothing-and-applications-to-multi-user-quantum-information-tasks","status":"publish","type":"seminar","link":"https:\/\/webs.uab.cat\/giq\/seminar\/decoupling-by-local-random-unitaries-without-simultaneous-smoothing-and-applications-to-multi-user-quantum-information-tasks\/","title":{"rendered":"Decoupling by local random unitaries without simultaneous smoothing, and applications to multi-user quantum information tasks."},"content":{"rendered":"\n<p>Decoupling is a fundamental primitive in the design of quantum transmission codes, quantum Slepian-Wolf coding, cryptographic communication, and channel simulation, but has so far been largely limited to single-user settings. Recently, we demonstrated how to leverage tensorization properties of expected-contractive maps, to extend the basic toolbox to simultaneous decoupling in a multipartite setting where each party applies their own random unitary. We have successfully established achievability bounds for general multipartite decoupling, using the usual smooth conditional min-entropies in one-shot scenarios, as well as conditional R\u00e9nyi entropies. We have shown the power of these results by presenting a series of relevant applications in multi-user quantum information tasks.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Decoupling is a fundamental primitive in the design of quantum transmission codes, quantum Slepian-Wolf coding, cryptographic communication, and channel simulation, but has so far been largely limited to single-user settings. Recently, we demonstrated how to leverage tensorization properties of expected-contractive maps, to extend the basic toolbox to simultaneous decoupling in a multipartite setting where each [&hellip;]<\/p>\n","protected":false},"author":2608,"featured_media":0,"template":"","class_list":["post-2132","seminar","type-seminar","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/seminar\/2132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/seminar"}],"about":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/types\/seminar"}],"author":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/users\/2608"}],"wp:attachment":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/media?parent=2132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}