{"id":3185,"date":"2022-10-28T15:12:49","date_gmt":"2022-10-28T20:12:49","guid":{"rendered":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/?post_type=tribe_events&#038;p=3185"},"modified":"2022-11-02T09:40:53","modified_gmt":"2022-11-02T14:40:53","slug":"lans-seminar-66","status":"publish","type":"tribe_events","link":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/event\/lans-seminar-66\/","title":{"rendered":"LANS Seminar"},"content":{"rendered":"<p><strong>Seminar Title<\/strong>: Deterministic and Robust Control Pulse Optimization for Quantum Systems<br \/>\n<strong>Speaker<\/strong>: Xinyu Fei, PhD Candidate, University of Michigan<\/p>\n<p><strong>Date\/Time<\/strong>: November 2, 2022 \/ 10:30 AM &#8211; 11:30 AM<br \/>\n<strong>Location<\/strong>: See meeting URL on the cels-seminars website\u00a0(requires Argonne login)<\/p>\n<p><strong>Host<\/strong>: Jeff Larson<\/p>\n<hr \/>\n<p><strong>Description<\/strong>: We study a binary optimal quantum control problem highly corresponding to diverse quantum algorithms. We develop a generic discrete-valued model and several extensions to handle additional side constraints and reduce switches. We propose an algorithmic framework combining modified popular gradient ascent pulse engineering (GRAPE) algorithm, a new alternating direction method of multipliers (ADMM) algorithm, rounding techniques, and a modified trust-region method to obtain high-quality control with less chattering. Furthermore, we develop new approaches to extract controller sequences from fractional discretized control solutions and propose a switching time optimization model with a given controller sequence, which improves the solutions as well as reduces the computation. Taking the uncertainty of controllers into account, we propose an extended chance-constrained model with a conditional value at risk (CVaR) function. We derive a closed formulation for the non-differentiable and non-convex objective function and solve the model based on our previous modified GRAPE algorithm. We demonstrate that our CVaR model improves the robustness of controls under uncertain circumstances.<\/p>\n<p><strong>Bio:<\/strong> Xinyu Fei is a Ph.D. Candidate at the Department of Industrial and Operations Engineering at the University of Michigan. Her research interest focuses on developing models and efficient algorithms for solving large-scale nonconvex optimization problems in complex networks. Her awards include the Michigan Institute for Computational Discovery and Engineering (MICDE) Student Fellowship (2021) and the Engineering Graduate Fellowship, UM 2019.<\/p>\n<p><em>Please note that the meeting URL for this event can be seen on the <\/em>cels-seminars website<em>, which requires an Argonne login.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Seminar Title: Deterministic and Robust Control Pulse Optimization for Quantum Systems Speaker: Xinyu Fei, PhD Candidate, University of Michigan Date\/Time: November 2, 2022 \/ 10:30 AM &#8211; 11:30 AM Location: See meeting URL on the cels-seminars website\u00a0(requires Argonne login) Host: &hellip; <a href=\"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/event\/lans-seminar-66\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":43,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"tags":[],"tribe_events_cat":[2],"class_list":["post-3185","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-seminar","cat_seminar"],"acf":[],"_links":{"self":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/3185","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events"}],"about":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/types\/tribe_events"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/users\/43"}],"version-history":[{"count":1,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/3185\/revisions"}],"predecessor-version":[{"id":3186,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/3185\/revisions\/3186"}],"wp:attachment":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/media?parent=3185"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tags?post=3185"},{"taxonomy":"tribe_events_cat","embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events_cat?post=3185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}