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UID:10001158-1676286000-1676289600@cmsa.fas.harvard.edu
SUMMARY:Parity and Cobordism
DESCRIPTION:Swampland Seminar \nSpeaker: Jake McNamara (Caltech)\n\nTitle: Parity and Cobordism\n\nAbstract: The swampland cobordism conjecture provides a convenient way to discuss conserved charges associated with the topology of spacetime. However\, much of the power of the cobordism conjecture comes from a mathematical black box: the Adams spectral sequence. In this talk\, I will give physical meaning to this black box through a concrete example: domain walls arising from the spontaneously breaking of parity symmetry\, which arise in particle physics in Nelson-Barr models. I will argue that parity domain walls are exactly stable\, and interpret this stability as the result of an unusual type of gauge symmetry that can only occur in gravitational theories.\n 
URL:https://cmsa.fas.harvard.edu/event/swampland_21323-2/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Topological-Seminar-11.15.23.png
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UID:10001274-1676291400-1676295000@cmsa.fas.harvard.edu
SUMMARY:Complete Calabi-Yau metrics: Recent progress and open problems
DESCRIPTION:Speaker: Tristan Collins\, MIT \nTitle: Complete Calabi-Yau metrics: Recent progress and open problems \nAbstract: Complete Calabi-Yau metrics are fundamental objects in Kahler geometry arising as singularity models or “bubbles” in degenerations of compact Calabi-Yau manifolds.  The existence of these metrics and their relationship with algebraic geometry are the subjects of several long standing conjectures due to Yau and Tian-Yau. I will describe some recent progress towards the question of existence\, and explain some future directions\, highlighting connections with notions of algebro-geometric stability.
URL:https://cmsa.fas.harvard.edu/event/collquium-21323/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/02CMSA-Colloquium-02.13.2023-.png
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