{"id":942,"date":"2013-04-02T10:34:43","date_gmt":"2013-04-02T08:34:43","guid":{"rendered":"https:\/\/webs.uab.cat\/giq\/seminar\/how-much-work\/"},"modified":"2013-04-02T10:34:43","modified_gmt":"2013-04-02T08:34:43","slug":"how-much-work","status":"publish","type":"seminar","link":"https:\/\/webs.uab.cat\/giq\/seminar\/how-much-work\/","title":{"rendered":"How much work?"},"content":{"rendered":"<p><span style=\"line-height: 20px;\">The concept of work in thermodynamics is well known and can be well<\/span><br \/>defined in a process in which a property of the system (the position of a<br \/>piston, the strength of a field) changes from an initial to a final value.<br \/>In quantum mechanics it has been recently realised that work cannot be<br \/>associated with the expectation value of an observable but rather with the<br \/>transition probabilities between energy eigenstates [1]. As a consequence,<br \/>only the work probability distribution can be properly defined for a given<br \/>process.<br \/>In this seminar I will first revise the recent developments concerning the<br \/>definition of work in quantum mechanics. Then I will discuss a proposal,<br \/>based on Ramsey interferometry, for measuring the work probability<br \/>distribution in an experiment. Although our proposal can be adapted to<br \/>most quantum technologies, I will explicitly discuss one example based on<br \/>an optomechanical setup.<\/p>\n<p>[1] M. Campisi, P. Haenggi and P. Talkner, Rev. Mod. Phys. 83, 771 (2011).<br \/>[2] L. Mazzola, G. De Chiara and M. Paternostro, arxiv:1301.7030<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The concept of work in thermodynamics is well known and can be welldefined in a process in which a property of the system (the position of apiston, the strength of a field) changes from an initial to a final value.In quantum mechanics it has been recently realised that work cannot beassociated with the expectation value [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":0,"template":"","class_list":["post-942","seminar","type-seminar","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/giq\/wp-json\/wp\/v2\/seminar\/942","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=942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}