Waseda University’s Multiscale Analysis, Modelling and Simulation Unit (Top Global University Project) presents a three-day special online quantum physics seminar series.<\/p>\n
Dates:<\/p>\n
Venue: Online via Zoom Speaker: Prof. Saverio Pascazio (University of Bari, Italy) Speaker: Prof. Paolo Facchi (University of Bari, Italy) References: Speaker: Prof. Daniel Burgarth (Macquarie University, Sydney) Waseda University’s Multiscale Analysis, Modelling and Simulation Unit (Top Global University Project) p […]<\/p>\n","protected":false},"author":3,"featured_media":12699,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[83,109],"class_list":["post-12639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-en","tag-events-en","tag-en-mams"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/posts\/12639","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/comments?post=12639"}],"version-history":[{"count":2,"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/posts\/12639\/revisions"}],"predecessor-version":[{"id":16521,"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/posts\/12639\/revisions\/16521"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/media\/12699"}],"wp:attachment":[{"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/media?parent=12639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/categories?post=12639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.waseda.jp\/inst\/sgu\/wp-json\/wp\/v2\/tags?post=12639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nLanguage: English
\nAudience: Open to students, faculty, staff
\nParticipation Fee: Free of charge
\nContact: Department of Physics, Professor Kazuya YUASA – yuasa(a)waseda.jp
\nWebsite: https:\/\/www.f.waseda.jp\/yuasa\/SGU2021.html<\/a>
\nDetails: See below for the details for each seminar (also available here<\/a>.)<\/p>\nDimensional Reduction of Gauge Theories<\/h2>\n
\nDate: Mon, Feb. 7, 2022, 17:00-19:00 JST
\nAbstract:
\nWe derive and discuss one- and two-dimensional models for classical electromagnetism by making use of Hadamard’s method of descent. Low-dimensional electromagnetism is conceived as a specialization of the higher dimensional one, in which the fields are uniform along the additional spatial directions. We then consider two-dimensional models for a charged spin-1\/2 particle, both in the free case and in the presence of the electromagnetic field, by applying the same reduction technique. The basic properties of these theories, as well as their relation with existing models for two-dimensional matter, are discussed.<\/p>\nLong-Time Stability of Perturbed Quantum Symmetries<\/h2>\n
\nDate: Tue,\u00a0Feb. 8, 2022,\u00a017:00-19:00 JST
\nAbstract:
\nWe show that for any finite-dimensional quantum systems the conserved quantities can be characterized by their robustness to small perturbations: for fragile symmetries, small perturbations can lead to large deviations over long times, while for robust symmetries, their expectation values remain close to their initial values for all times. This is in analogy with the celebrated Kolmogorov-Arnold-Moser theorem in classical mechanics.<\/p>\n
\nD. Burgarth, P. Facchi, H. Nakazato, S. Pascazio, and K. Yuasa,
\n“Kolmogorov-Arnold-Moser Stability for Conserved Quantities in Finite-Dimensional Quantum Systems,” Phys. Rev. Lett. 126, 150401 (2021);
\n“Eternal Adiabaticity in Quantum Evolution,” Phys. Rev. A 103, 032214 (2021).<\/p>\nBounds for the Rotating Wave Approximation<\/h2>\n
\nDate: Thu, Feb. 10, 2022,\u00a017:00-19:00 JST
\nAbstract:
\nThe rotating wave approximation is a commonly used approximation in quantum physics. Often, it is taught in a very ad-hoc manner, without a proper justification. In this lecture I will give a gentle introduction to the subject and show how the quality of the approximation can be bounded.<\/p>\n","protected":false},"excerpt":{"rendered":"