{"id":891,"date":"2010-05-06T11:40:13","date_gmt":"2010-05-06T09:40:13","guid":{"rendered":"https:\/\/webs.uab.cat\/giq\/seminar\/zero-error-capacities-quantum-channels\/"},"modified":"2010-05-06T11:40:13","modified_gmt":"2010-05-06T09:40:13","slug":"zero-error-capacities-quantum-channels","status":"publish","type":"seminar","link":"https:\/\/webs.uab.cat\/giq\/seminar\/zero-error-capacities-quantum-channels\/","title":{"rendered":"Zero-error capacities of quantum channels"},"content":{"rendered":"<p>Quantum channels have all sorts of capacities: classical, quantum, private, etc. In addition, the capacity typically changes in the presence of additional resources, such as feedback, shared entanglement, etc. Very recently, quite a lot of progress was made regarding the limit of perfect communication in the above settings, at finite block length. I will review some of the most exciting results found, among them the superactivation of zero-error capacities; the fact that entanglement can increase the (0-error) communication capability even of a classical channel; an extension of Lovasz&#8217; theta upper bound to entanglement-assisted quantum channels; and a complete characterisation of zero-error channel coding, including a reverse zero-error Shannon theorem, when assisted by general non-signalling correlations.<\/p>\n<p>Based on joint work with T S Cubitt, D Leung, W Matthews, S Severini and R Duan [arXiv:0911.5300, 1002.2514 and 1003.3195]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quantum channels have all sorts of capacities: classical, quantum, private, etc. In addition, the capacity typically changes in the presence of additional resources, such as feedback, shared entanglement, etc. Very recently, quite a lot of progress was made regarding the limit of perfect communication in the above settings, at finite block length. I will review [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":0,"template":"","class_list":["post-891","seminar","type-seminar","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/seminar\/891","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\/20"}],"wp:attachment":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/media?parent=891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}