{ "151090-21912210": { "datetime_modified":"20261106T124230", "datetime_start":"20261111T100000", "datetime_end":"20261111T110000", "has_end_time":1, "date_start":"2026-11-11", "date_end":"2026-11-11", "time_start":"10:00:00", "time_end":"11:00:00", "time_zone":"America\/Detroit", "event_title":"AI for Physics Seminar Series", "occurrence_title":"", "combined_title":"AI for Physics Seminar Series: Various", "event_subtitle":"Various", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"This seminar series will take place in 340 West Hall, Bi-weekly, Wednesdays from 10:00--11:00 am\n\nFor details please see;\n\nhttps:\/\/umich-ai4physics.github.io\/)", "occurrence_notes":null, "guid":"151090-21912210@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151090", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science","Lecture"], "website":"https:\/\/umich-ai4physics.github.io\/)", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "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":7, "first_occurrence":21910857 } , "151160-21910991": { "datetime_modified":"20261023T072027", "datetime_start":"20261111T120000", "datetime_end":"20261111T130000", "has_end_time":1, "date_start":"2026-11-11", "date_end":"2026-11-11", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"HET Brown Bag Seminar | Growing large SMBH at early times with dark atoms", "occurrence_title":"", "combined_title":"HET Brown Bag Seminar | Growing large SMBH at early times with dark atoms: Akshay Ghalsasi (Harvard)", "event_subtitle":"Akshay Ghalsasi (Harvard)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Observations by JWST have indicated the presence of large SMBH within the first 500 Myr of the universe. The existence of these black holes require the BH seeds to grow faster than allowed by the Eddington limit. In this talk I will consider the growth of these black holes if a small component of dark matter was dissipative in nature. Using dark atoms as a concrete example of dissipative dark matter, we show that it is possile to grow large BHs in the early universe through accretion of dark atoms or by starting out with larger seeds.", "occurrence_notes":null, "guid":"151160-21910991@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151160", "building_id":"1000208", "building_name":"Randall Laboratory", "campus_maps_id":"133", "room":"3481", "location_name":"Randall Laboratory", "has_livestream":0, "cost":"", "tags":["Lecture","Talk","Science","Physics","Brown Bag Seminar","brown bag"], "website":"", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "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":21910991 } , "151162-21910993": { "datetime_modified":"20261026T085513", "datetime_start":"20261113T150000", "datetime_end":"20261113T160000", "has_end_time":1, "date_start":"2026-11-13", "date_end":"2026-11-13", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HET Seminar | Euclidean Wormholes and Axion Cosmology", "occurrence_title":"", "combined_title":"HET Seminar | Euclidean Wormholes and Axion Cosmology: Gary Shiu (Wisconsin)", "event_subtitle":"Gary Shiu (Wisconsin)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Axions arise ubiquitously in theories of particle physics and quantum gravity and may play important roles in cosmology, from inflation and dark matter to dark energy. This raises a basic question: does quantum gravity constrain the allowed parameter space of axions, and can such constraints have observable consequences? I will discuss how Euclidean wormholes provide a surprising connection between these questions and quantum gravity. I will first review the axionic Weak Gravity Conjecture (aWGC), including the importance of its order-one coefficient for axion phenomenology, and then describe how Euclidean wormholes may give rise to this bound. I will discuss the perturbative stability of axion wormholes and their explicit realization in string theory, both in flat space and in AdS. Finally, I will present recent work showing that the aWGC can arise directly from the nonperturbative fragmentation of Euclidean wormholes into charged defects. Requiring such fragmentation to lower the Euclidean action fixes the action-to-charge bound and its order-one coefficient, and reveals a direct connection to the Imaginary Distance Bound. This suggests that quantum-gravitational constraints on axions can be understood as conditions on the non-perturbative stability of gravitational saddles, with implications for axion cosmology and the consistency of effective field theories.", "occurrence_notes":null, "guid":"151162-21910993@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151162", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Seminar","Science","Physics","Lecture","High Energy Theory Seminar","Talk"], "website":"", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "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":21910993 } , "151090-21912211": { "datetime_modified":"20261106T124230", "datetime_start":"20261118T100000", "datetime_end":"20261118T110000", "has_end_time":1, "date_start":"2026-11-18", "date_end":"2026-11-18", "time_start":"10:00:00", "time_end":"11:00:00", "time_zone":"America\/Detroit", "event_title":"AI for Physics Seminar Series", "occurrence_title":"", "combined_title":"AI for Physics Seminar Series: Various", "event_subtitle":"Various", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"This seminar series will take place in 340 West Hall, Bi-weekly, Wednesdays from 10:00--11:00 am\n\nFor details please see;\n\nhttps:\/\/umich-ai4physics.github.io\/)", "occurrence_notes":null, "guid":"151090-21912211@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151090", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science","Lecture"], "website":"https:\/\/umich-ai4physics.github.io\/)", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "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":7, "first_occurrence":21910857 } , "151289-21911322": { "datetime_modified":"20261107T084418", "datetime_start":"20261118T120000", "datetime_end":"20261118T130000", "has_end_time":1, "date_start":"2026-11-18", "date_end":"2026-11-18", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"HET Brown Bag Seminar | Long-range interaction between extremal black holes in two derivative effective theories of gravity", "occurrence_title":"", "combined_title":"HET Brown Bag Seminar | Long-range interaction between extremal black holes in two derivative effective theories of gravity: Aritra Saha (Texas A&M)", "event_subtitle":"Aritra Saha (Texas A&M)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"In two derivative theories of gravity, the long-range force between a generic extremal black hole and its identical copy vanishes. On the other hand, if extremal black holes are supersymmetric, then the long-range force (and short-range as well) between any two such black holes vanishes. This brings up the interesting question of what happens to the long-range force between two extremal black holes when they are generically non-supersymmetric? In this talk, we will develop a framework for two derivative theories of gravity coupled to scalars and gauge fields which will generically allow us to estimate the long-range force between two non-identical black holes without knowing their explicit metrics. We shall discuss this framework first in the context of Einstein-Maxwell-Dilaton theory in 4D with a single arbitrary coupling constant (called \"a''), and extend this discussion to higher dimensions. We shall see that the long-range force shows a universal feature: the force vanishes for the supersymmetric coupling (a=1), it remains repulsive if the coupling is tuned to be greater than the supersymmetric coupling (a>1), and it becomes attractive if the coupling becomes less than the supersymmetric coupling (a<1). We shall then add axions to the discussion and show how the universality of the long-range force becomes more murky. Finally we shall develop an understanding of the long-range force using the interaction energy picture within the initial value formulation of gravity, owing to Brill and Lindquist.", "occurrence_notes":null, "guid":"151289-21911322@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151289", "building_id":"1000208", "building_name":"Randall Laboratory", "campus_maps_id":"133", "room":"3481", "location_name":"Randall Laboratory", "has_livestream":0, "cost":"", "tags":["Physics","brown bag","Brown Bag Seminar","Lecture","Science","Talk"], "website":"", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "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":21911322 } , "151751-21912130": { "datetime_modified":"20261106T121148", "datetime_start":"20261120T150000", "datetime_end":"20261120T160000", "has_end_time":1, "date_start":"2026-11-20", "date_end":"2026-11-20", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HET Seminar | The Search for Light Dark Matter", "occurrence_title":"", "combined_title":"HET Seminar | The Search for Light Dark Matter: Tanner Trickle (Illinois)", "event_subtitle":"Tanner Trickle (Illinois)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Recent years have seen a dramatic expansion in ideas regarding the nature of dark matter, extending beyond the WIMP paradigm. Many of these theories predict minuscule couplings between light (sub-GeV mass) dark matter and the Standard Model, which direct detection experiments can search for. In this talk we will begin by reviewing the status of current electron-based experiments which are achieving extraordinary sensitivity to theoretically well-motivated freeze-in dark matter models. Next, we discuss how condensed matter sum rules can inform future detector development, and show how non-relativistic effective field theories can be used to understand the detector response to general dark matter-electron interactions. Finally, we will discuss how the next generation of direct detection experiments using meV-scale excitations, such as phonons and magnons, can begin to probe the sub-MeV dark matter mass frontier.", "occurrence_notes":null, "guid":"151751-21912130@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151751", "building_id":"1000208", "building_name":"Randall Laboratory", "campus_maps_id":"133", "room":"4404", "location_name":"Randall Laboratory", "has_livestream":0, "cost":"", "tags":["Lecture","Seminar","Science","Physics","High Energy Theory Seminar"], "website":"", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "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":21912130 } , "151090-21918062": { "datetime_modified":"20261106T124230", "datetime_start":"20261202T100000", "datetime_end":"20261202T110000", "has_end_time":1, "date_start":"2026-12-02", "date_end":"2026-12-02", "time_start":"10:00:00", "time_end":"11:00:00", "time_zone":"America\/Detroit", "event_title":"AI for Physics Seminar Series", "occurrence_title":"", "combined_title":"AI for Physics Seminar Series: Various", "event_subtitle":"Various", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"This seminar series will take place in 340 West Hall, Bi-weekly, Wednesdays from 10:00--11:00 am\n\nFor details please see;\n\nhttps:\/\/umich-ai4physics.github.io\/)", "occurrence_notes":null, "guid":"151090-21918062@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151090", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science","Lecture"], "website":"https:\/\/umich-ai4physics.github.io\/)", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "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":7, "first_occurrence":21910857 } , "151161-21910992": { "datetime_modified":"20260829T095001", "datetime_start":"20261202T120000", "datetime_end":"20261202T130000", "has_end_time":1, "date_start":"2026-12-02", "date_end":"2026-12-02", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"HET Brown Bag Seminar |", "occurrence_title":"", "combined_title":"HET Brown Bag Seminar |: Taegyu Lee (Indiana)", "event_subtitle":"Taegyu Lee (Indiana)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"tbd", "occurrence_notes":null, "guid":"151161-21910992@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151161", "building_id":"1000208", "building_name":"Randall Laboratory", "campus_maps_id":"133", "room":"3481", "location_name":"Randall Laboratory", "has_livestream":0, "cost":"", "tags":["Science","brown bag","Brown Bag Seminar","Lecture","Physics","Talk"], "website":"", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "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":21910992 } , "151403-21911505": { "datetime_modified":"20260902T123913", "datetime_start":"20261204T150000", "datetime_end":"20261204T160000", "has_end_time":1, "date_start":"2026-12-04", "date_end":"2026-12-04", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HET Seminar", "occurrence_title":"", "combined_title":"HET Seminar: Kiril Hristov (Bulgaria\/IAS)", "event_subtitle":"Kiril Hristov (Bulgaria\/IAS)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"tbd", "occurrence_notes":null, "guid":"151403-21911505@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151403", "building_id":"1000208", "building_name":"Randall Laboratory", "campus_maps_id":"133", "room":"4404", "location_name":"Randall Laboratory", "has_livestream":0, "cost":"", "tags":["High 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"event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":7, "first_occurrence":21910857 } }