Events at 402 Classroom Physics South Hall, Campus

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We introduce a new algebraic framework to describe gravitational scrambling, including the semiclassical limit of any out-of-time-order correlation function that consists of s-wave operator insertions separated by approximately the scrambling time. This algebra, which we call a modular-twisted product, is defined starting from two half-sided modular inclusions of von Neumann algebras, interpreted physically as the large N limit of products … Read More

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I will propose a mechanism, based on the Chern-Simons formulation of three-dimensional Euclidean gravity, that couples matter fields to three-dimensional de Sitter quantum gravity. First, I will derive su(2) representations that differ in Hermiticity choice from the usual unitary representations; these are important for gravitational applications of Chern-Simons theory. I will then introduce the concept of a “Wilson spool” constructed … Read More

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Abstract: Leptogenesis has become one of the leading theories to explain the baryon asymmetry of the universe. The existence of non-zero but tiny neutrino masses has been established through neutrino oscillation experiments. The smallness of the neutrino masses can be understood by introducing heavy right-handed neutrinos. If such neutrinos were produced in the early universe and decayed out of equilibrium, … Read More