Physics

Abstract: Fusion 2-categories offer a higher dimensional generalization of the category of symmetries in (1+1)d. I will explain how to leverage fusion 2-categories in a special case and apply them to understand the categorical structure of (3+1)d...

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Abstract: The James Webb Space Telescope was called the "First Light Machine" when it was being studied as a potential NASA mission.  It quickly became obvious that it would be impossible to prove that the "first" galaxy had been seen, but much more...

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Abstract: We construct the classical phase space of Jackiw-Teitelboim (JT) gravity with positive cosmological constant on spatial slices with circle topology. We identify solutions not previously discussed in the literature, and find the phase space...

Abstract: Historically, the synergy between physics and geometry, from the time of Archimedes and Newton to the era of Einstein, has repeatedly catalyzed breakthroughs in physics and mathematics. In this presentation, we will explore a new narrative...

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Abstract: One of the best understood AdS/CFT incarnations relates tensionless k=1 strings on AdS3 to a symmetric product CFT2. I will discuss an exact duality between string theory on a spacetime which is not asymptotically AdS and a non-conformal...