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DTSTART;TZID=America/New_York:20221011T110000
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DTSTAMP:20240215T091450Z
CREATED:20230730T183036Z
LAST-MODIFIED:20240215T091450Z
UID:10001152-1665486000-1665489600@live-hu-cmsa-222.pantheonsite.io
SUMMARY:The Penrose Inequality as a Constraint on Low Energy Quantum Gravity
DESCRIPTION:Swampland Seminar\n\nSpeaker: Aasmund Folkestad (MIT)\n\n\nTitle: The Penrose Inequality as a Constraint on Low Energy Quantum Gravity\n\nAbstract: In this talk\, I argue that the Penrose inequality (PI) can be used to constrain low energy theories compatible AdS/CFT\, and possibly also quantum gravity in flat space. Focusing on AdS/CFT\, it is shown that the PI can be violated for minimally coupled scalar fields\, and I produce exclusion plots on couplings that respect the PI. I also present numerical evidence that top-down scalar theories and supersymmetric theories respect the PI. Finally\, similar to the Breitenlohner-Freedman bound\, I give a necessary condition for the stability AdS that constrains coupling constants (beyond the scalar mass).
URL:https://live-hu-cmsa-222.pantheonsite.io/event/swampland_101122/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
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DTSTART;TZID=America/New_York:20221024T110000
DTEND;TZID=America/New_York:20221024T120000
DTSTAMP:20240110T045511Z
CREATED:20230730T183559Z
LAST-MODIFIED:20240110T045511Z
UID:10001153-1666609200-1666612800@live-hu-cmsa-222.pantheonsite.io
SUMMARY:Anomalies of Discrete Gauge Symmetries and their Cancellation in 6D F-theory
DESCRIPTION:Swampland Seminar \nSpeaker: Paul-Konstantin Oehlmann(Northeastern) \nTitle: Anomalies of Discrete Gauge Symmetries and their Cancellation in 6D F-theory \nAbstract: We consider 6D SUGRAs with a discrete gauge group G\, engineered via F-theory compactifications on genus-one fibered threefolds. We argue that group G suffers from Dai-Freed anomalies that can be canceled via a discrete Green-Schwarz mechanism. We comment on the ambiguity to assign this GS term in the 7D Anomaly theory which leads to choices that are not all compatible with F-theory. \nIn F-theory we then deduce this Anomaly coefficient explicitly by computing the elliptic genera of the non-critical strings that couple to the 6D two-form fields: Their 2D worldsheet theories inherits a G Flavor symmetries whose t’Hooft anomaly cancels the 6D Dai-Freed anomaly in the bulk via inflow. This talk is based on work in preparation together with Markus Dierigl and Thorsten Schimmanek.
URL:https://live-hu-cmsa-222.pantheonsite.io/event/swampland_102422/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
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