{"id":1053,"date":"2016-01-11T10:34:19","date_gmt":"2016-01-11T08:34:19","guid":{"rendered":"https:\/\/webs.uab.cat\/giq\/seminar\/identification-quantum-change-point\/"},"modified":"2016-01-11T10:34:19","modified_gmt":"2016-01-11T08:34:19","slug":"identification-quantum-change-point","status":"publish","type":"seminar","link":"https:\/\/webs.uab.cat\/giq\/seminar\/identification-quantum-change-point\/","title":{"rendered":"Identification of a quantum change point"},"content":{"rendered":"<div>A source &nbsp;assumed to prepare identical copies of a state suffers some internal alteration that makes it to&nbsp;start producing a different type of state. &nbsp;We are interested in knowing when the change occurred assuming that it happens with equal probability at any point &nbsp;of a string of N states.&nbsp;This an instance of multi-hypoteses discrimination for which very few results are known. I will review the optimality&nbsp;conditions and apply them for this task. I will compute the optimal asymptotic solution, and obtain a closed&nbsp;expression, which involve the use of some nice tricks. I will also compare it with (numerical) results of local protocols.<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A source &nbsp;assumed to prepare identical copies of a state suffers some internal alteration that makes it to&nbsp;start producing a different type of state. &nbsp;We are interested in knowing when the change occurred assuming that it happens with equal probability at any point &nbsp;of a string of N states.&nbsp;This an instance of multi-hypoteses discrimination for [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":0,"template":"","class_list":["post-1053","seminar","type-seminar","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/seminar\/1053","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=1053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}