Special String Math Seminar: Nikita Nekrasov (Stony Brook University) “Yang-Mills flows for twisted multilayer graphene”
We describe an unexpected application of geometry of the space of gauge fields in two dimensional Yang-Mills theory, the subject of celebrated works of Narasimhan-Seshadri and Atiyah-Bott, to the active domain of research in condensed matter physics: the search for high-Tc superconductivity in exotic materials. Specifically, we shall clarify the meaning of the phenomenon of “magic angles” in the physics … Read More
Gautam Satishchandran (Princeton) “Generalized Entropy is von Neumann Entropy “
We consider the algebra of gravitational perturbations of the subregion of spacetime corresponding to the exterior of a black hole or the static patch of de Sitter. The algebra of gravitational perturbations are subject to constraints arising from the group of large gauge transformations of the subregion. Physically, these constraints arise due to the backreaction of gravitational perturbations on the … Read More