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Parity and Cobordism

February 13, 2023 @ 11:00 am - 12:00 pm

Swampland Seminar

Speaker: Jake McNamara (Caltech)
Title: Parity and Cobordism
Abstract: 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.



February 13, 2023
11:00 am - 12:00 pm
Event Category:


CMSA Room G10
CMSA, 20 Garden Street
Cambridge, MA 02138 United States
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