{"id":1098,"date":"2017-02-14T12:37:24","date_gmt":"2017-02-14T10:37:24","guid":{"rendered":"https:\/\/webs.uab.cat\/giq\/seminar\/fundamental-limits-for-cooling-of-linear-quantum-refrigerators\/"},"modified":"2017-02-14T12:37:24","modified_gmt":"2017-02-14T10:37:24","slug":"fundamental-limits-for-cooling-of-linear-quantum-refrigerators","status":"publish","type":"seminar","link":"https:\/\/webs.uab.cat\/giq\/seminar\/fundamental-limits-for-cooling-of-linear-quantum-refrigerators\/","title":{"rendered":"Fundamental limits for cooling of linear quantum refrigerators"},"content":{"rendered":"<p>I study the asymptotic dynamics of a network of oscillators whose frequencies and couplings are&nbsp;periodically driven while coupled with a number of bosonic reservoirs. I obtain exact results for the heat&nbsp;currents coming into the system from each reservoir (valid beyond the usual weak coupling, weak driving&nbsp;or Markovian approximations). I use these expressions to rigorously prove the validity of the dynamical&nbsp;version of the third law of thermodynamics (Nernst unattainability principle) in this context. The&nbsp;fundamental limit for cooling is imposed by a heating process which is present at zero temperature. It&nbsp;consists of the non resonant creation of pairs of excitations in the reservoirs by the driving field. It is&nbsp;intrinsically quantum, it is linked to the dynamical Casimir effect and it is not captured by usual&nbsp;perturbative treatments. Thus, for any&nbsp;cooling strategy there is a minimum attainable temperature, that&nbsp;we estimate for some relevant examples.<br \/>\nExperimental proposals will also be discussed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I study the asymptotic dynamics of a network of oscillators whose frequencies and couplings are&nbsp;periodically driven while coupled with a number of bosonic reservoirs. I obtain exact results for the heat&nbsp;currents coming into the system from each reservoir (valid beyond the usual weak coupling, weak driving&nbsp;or Markovian approximations). I use these expressions to rigorously prove [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":0,"template":"","class_list":["post-1098","seminar","type-seminar","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/seminar\/1098","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=1098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}