{"id":1173,"date":"2019-03-19T14:41:27","date_gmt":"2019-03-19T12:41:27","guid":{"rendered":"https:\/\/webs.uab.cat\/giq\/seminar\/quantum-measurements-and-the-third-law-of-thermodynamics-entanglement-distribution-beyond-qubits\/"},"modified":"2019-03-19T14:41:27","modified_gmt":"2019-03-19T12:41:27","slug":"quantum-measurements-and-the-third-law-of-thermodynamics-entanglement-distribution-beyond-qubits","status":"publish","type":"seminar","link":"https:\/\/webs.uab.cat\/giq\/seminar\/quantum-measurements-and-the-third-law-of-thermodynamics-entanglement-distribution-beyond-qubits\/","title":{"rendered":"Quantum measurements and the third law of thermodynamics. Entanglement distribution beyond qubits."},"content":{"rendered":"<p>1) Quantum measurements and the third law of thermodynamics.<\/p>\n<p>Noise can be considered the natural enemy of quantum information.&nbsp; An often implied benefit<br \/>\nof high-dimensional entanglement is its increased resilience to noise.&nbsp; However,&nbsp; manifesting&nbsp; this<br \/>\npotential in an experimental setting is challengingm, as the dimension is not really a free parameter and<br \/>\ndifferent dimensions often imply different implementations. For discretising continuous degrees of<br \/>\nfreedom, however, one can tune the Hilbert space dimension through discretisation and we show<br \/>\nhow to explot two pathways to noise resilience in that context and demonstrate that high-dimensional<br \/>\nentanglement can indeed survive environmental conditions that no qubit encoding could survive.<\/p>\n<p>2) Entanglement distribution beyond qubits.<\/p>\n<p>The third law of thermodynamics can be phrased as an impossibility of cooling any physical system to<br \/>\nabsolute zero temperature. The projection postulate of quantum mechanics, however, predicts pure<br \/>\npost-measurement states in idealised settings. We show how a self-contained treatment connects the<br \/>\ntwo concepts and extends the impossibility of cooling to the impossibility of perfect measurements or<br \/>\nLandauer erasure with finite thermodynamic resources. We will also discuss more quantitative trade-offs<br \/>\nbetween energy, time and complexity.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1) Quantum measurements and the third law of thermodynamics. Noise can be considered the natural enemy of quantum information.&nbsp; An often implied benefit of high-dimensional entanglement is its increased resilience to noise.&nbsp; However,&nbsp; manifesting&nbsp; this potential in an experimental setting is challengingm, as the dimension is not really a free parameter and different dimensions often [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":0,"template":"","class_list":["post-1173","seminar","type-seminar","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/seminar\/1173","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=1173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}