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Watch this 48-minute physics lecture from the Workshop on Symmetries and Gravity where Caltech researcher Jacob McNamara explores the complex relationship between conserved charges and quantum gravity. Delve into an advanced theoretical discussion examining how traditional symmetry operator concepts become challenging to define in quantum gravity while conserved charges remain meaningful. Learn about a newly discovered kinematic invariant in gravitational path integrals that builds upon quantum gravity's cobordism groups through the lens of closed universe charges. Understand how the categorification of Coleman, Giddings, and Strominger's argument demonstrates that conserved charges in quantum gravity, regardless of form degree, emerge solely from a categorical version of ensemble holography.
