{"id":1244,"date":"2022-02-14T20:50:33","date_gmt":"2022-02-14T18:50:33","guid":{"rendered":"https:\/\/webs.uab.cat\/giq\/seminar\/detecting-multipartite-entanglement-and-epr-steering-with-tools-from-metrology\/"},"modified":"2022-02-14T20:50:33","modified_gmt":"2022-02-14T18:50:33","slug":"detecting-multipartite-entanglement-and-epr-steering-with-tools-from-metrology","status":"publish","type":"seminar","link":"https:\/\/webs.uab.cat\/giq\/seminar\/detecting-multipartite-entanglement-and-epr-steering-with-tools-from-metrology\/","title":{"rendered":"Detecting multipartite entanglement and EPR steering with tools from metrology"},"content":{"rendered":"<p><span lang=\"en-US\">The sensitivity of quantum states under small perturbations is the quantity of central interest in quantum metrology. Besides identifying strategies that lead to quantum-enhanced measurement precision, the metrological sensitivity provides detailed information about the state&#8217;s quantum correlations. We discuss metrological witnesses that reveal the multipartite entanglement structure, generalizing entanglement depth and k-separability. Furthermore, we use a metrological complementarity relation to formulate the Einstein-Podolsky-Rosen (EPR) paradox and to build a witness for EPR steering, a stronger form of entanglement. Metrological entanglement witnesses are able to capture delicate features of non-Gaussian quantum states and can be systematically optimized given any set of measurable observables.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The sensitivity of quantum states under small perturbations is the quantity of central interest in quantum metrology. Besides identifying strategies that lead to quantum-enhanced measurement precision, the metrological sensitivity provides detailed information about the state&#8217;s quantum correlations. We discuss metrological witnesses that reveal the multipartite entanglement structure, generalizing entanglement depth and k-separability. Furthermore, we use [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":0,"template":"","class_list":["post-1244","seminar","type-seminar","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/seminar\/1244","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=1244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}