CMSA EVENTS
April 28, 2021 1:00 pmI will use Walker-Wang models to demonstrate the connection between 1-form symmetry-protected topological phases and topological measurement-based quantum computation. I will describe the classification of these phases in terms of...
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CMSA EVENTS
April 27, 2021 9:00 amTITLE: Moment maps and the Yang-Mills functional ABSTRACT: In the early 1980s Michael Atiyah and Raoul Bott wrote two influential papers, ‘The Yang-Mills equations over Riemann surfaces’ and ‘The moment map and equivariant...
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DIFFERENTIAL GEOMETRY
April 27, 2021 8:00 amIn this talk, I will first briefly review the Deligne-Mostow theory of moduli spaces of weighted points on the projective line, and a construction of ball quotients from periods of...
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HARVARD-MIT ALGEBRAIC GEOMETRY
April 27, 2021 3:00 pmK-stability is an algebraic condition that characterizes the existence of K\"ahler-Einstein metrics on Fano varieties. Recently there has been a lot of work on the construction of the K-moduli space,...
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MATHEMATICAL PICTURE LANGUAGE
April 27, 2021 10:00 amWe consider spin-S quantum spin chains with a family of O(2S+1)-invariant nearest-neighbor interactions and discuss the ground state phase diagram of this family of models. Using a graphical representation for...
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CMSA EVENTS
April 26, 2021 10:00 amTopological field theories and holomorphic field theories have each had a substantial impact in both physics and mathematics, so it is natural to consider theories that are hybrids of the...
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CMSA EVENTS
April 22, 2021 9:00 amThe Navier-Stokes and Euler equations are the fundamental models for describing viscous and inviscid fluids, respectively. Based on ideas which date back to Kolmogorov and Onsager, solutions to these equations...
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CMSA EVENTS
April 22, 2021 10:30 amIn this talk, we generalize Witten's non-abelian bosonization in $(1+1)$-D to two and three spatial dimensions. Our theory applies to fermions with relativistic dispersion. The bosonized theories are non-linear sigma...
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OPEN NEIGHBORHOOD
April 21, 2021 4:30 pmIt is a classical fact that the product of a sum of two squares with a sum of two squares is naturally a sum of two squares. (One can also...
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NUMBER THEORY
April 21, 2021 3:00 pmThe absolute prismatic site of a p-adic formal scheme carries interesting arithmetic and geometric information attached to the formal scheme. In this talk, after recalling the definition of this site,...
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