{ "134491-21874410": { "datetime_modified":"20250331T091819", "datetime_start":"20250403T160000", "datetime_end":"20250403T170000", "has_end_time":1, "date_start":"2025-04-03", "date_end":"2025-04-03", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Algebraic and Geometric Convergence of Kleinian Groups", "occurrence_title":"", "combined_title":"Algebraic and Geometric Convergence of Kleinian Groups: Jingxuan Song", "event_subtitle":"Jingxuan Song", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"To study the topology of the deformation space of Kleinian groups, we need to understand the limiting object of a convergence sequence of Kleinian groups. We would focus on two types of convergence, the algebraic convergence and the geometric convergence. We would see, the two types of convergence of the same sequence might results in manifolds with different topological structures, and even when the two limits coincide as groups, the limiting group could give rise to manifolds with different homeomorphic types.", "occurrence_notes":null, "guid":"134491-21874410@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/134491", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"2866", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Student Dynamics\/Geometry\/Topology Seminar - Department of Mathematics", "group_id":"4909", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21874410 } , "134495-21874426": { "datetime_modified":"20250331T100423", "datetime_start":"20250403T160000", "datetime_end":"20250403T170000", "has_end_time":1, "date_start":"2025-04-03", "date_end":"2025-04-03", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Algebraic and Geometric Convergence of Kleinian Groups", "occurrence_title":"", "combined_title":"Algebraic and Geometric Convergence of Kleinian Groups: Jingxuan Song", "event_subtitle":"Jingxuan Song", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"To study the topology of the deformation space of Kleinian groups, we need to understand the limiting object of a convergence sequence of Kleinian groups. 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This talk will outline two approaches for spectral simulations that consider both the explicit atomistic environment and vibronic transitions. Both phenomena are responsible for spectral shapes in linear spectroscopy and the electronic evolution measured in nonlinear spectroscopy. The first approach utilizes snapshots of chromophore-environment configurations for which chromophore normal modes are determined. The second approach obtains excitation energies for a series of time-correlated snapshots. Both approaches make strides towards more accurate optical spectroscopy simulations. I will show how the approaches can also be made computationally feasible through machine learning of ground and excited state potentials, opening the door to new physical insights of complex condensed phase systems. By combining vibronic and environmental effects, along with machine learning for high level wave function theory, we resolve the long-standing challenge of accurately simulating the linear absorption spectrum of the aqueously solvated GFP chromophore.", "occurrence_notes":null, "guid":"125085-21854355@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/125085", "building_id":"1000158", "building_name":"Chemistry Dow Lab", "campus_maps_id":"34", "room":"1640", "location_name":"Chemistry Dow Lab", "has_livestream":0, "cost":"", "tags":["Chemistry","Physical Chemistry"], "website":"https:\/\/chemistry.ucmerced.edu\/content\/christine-isborn", "sponsors":[ { "group_name":"Department of Chemistry", "group_id":"3761", "website":"https:\/\/lsa.umich.edu\/chem" }, { "group_name":"Physical Chemistry", "group_id":"4390", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21854355 } }