{"id":1173,"date":"2013-01-02T17:07:06","date_gmt":"2013-01-02T17:07:06","guid":{"rendered":"http:\/\/users2.unimi.it\/aqm\/?p=1173"},"modified":"2016-10-06T14:23:34","modified_gmt":"2016-10-06T14:23:34","slug":"paper-on-discording-power-published-in-prl","status":"publish","type":"post","link":"https:\/\/sites.unimi.it\/aqm\/paper-on-discording-power-published-in-prl\/","title":{"rendered":"Paper on discording power published in PRL"},"content":{"rendered":"<div>\n<p>Good news for AQM. A new paper introducing the discording power of a unitary transformation has been just published in PRL. The paper reports the results of a collaboration of a group member (Matteo) with Francesco Plastina from Calabria University and Fernando Galve and Roberta Zambrini from University of Balearic Islands.<\/p>\n<p>The discording power of a unitary transformation assesses its capability to produce quantum discord, and the Letter shows that exist gates which are optimal discorders for any value of purity and that they belong to a class of operators that includes the SWAP. Other gates, even those universal for quantum computation, do not posses the same property: the CNOT, for example, is a perfect discorder only for states with low or unit purity, but not for intermediate values. The discording power of a two-qubit unitary also provides a generalization of the corresponding measure defined for entanglement to any value of the purity.<\/p>\n<p>More details at <a href=\"http:\/\/prl.aps.org\/abstract\/PRL\/v110\/i1\/e010501\">http:\/\/prl.aps.org\/abstract\/PRL\/v110\/i1\/e010501<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Good news for AQM. A new paper introducing the discording power of a unitary transformation has been just published in PRL. The paper reports the results of a collaboration of a group member (Matteo) with Francesco Plastina from Calabria University and Fernando Galve and Roberta Zambrini from University of Balearic Islands. The discording power of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"_links":{"self":[{"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/posts\/1173"}],"collection":[{"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/comments?post=1173"}],"version-history":[{"count":7,"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/posts\/1173\/revisions"}],"predecessor-version":[{"id":1180,"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/posts\/1173\/revisions\/1180"}],"wp:attachment":[{"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/media?parent=1173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/categories?post=1173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.unimi.it\/aqm\/wp-json\/wp\/v2\/tags?post=1173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}