Title: Quiver Yangian from Crystal Melting Abstract: The BPS counting of type IIA string theory on non-compact toric Calabi-Yauthreefolds can be described by crystal melting. I will explain how to construct the BPS algebras for these theories by a “bootstrap” method, whereone solves for the algebra by demanding that it acts on the correspondingBPS crystal appropriately. The resulting algebras are quiver Yangians Y(Q,W)that are associated with the quiver and the superpotential of the theory.Based on joint work with M. Yamazaki (arxiv: 2003.08909). Talk – PDF Talk – Video

Title: An Exact AdS/CFT Duality Abstract: The AdS/CFT correspondence relates string theory on an Anti de Sitter (AdS) background to a dual conformal field theory (CFT) living on the boundary of AdS. One promising strategy for how to prove the duality… Read More

Title: Twisted Holography Abstract: I will review an approach developed over the past few years to treating holography mathematically. This uses the mathematical language of Koszul duality. Talk – Video

Title: How to Compute Using Quantum Walks Abstract: Quantum walks are widely and successfully used to model diverse physical processes. This leads to computation of the models, to explore their properties. Quantum walks have also been shown to… Read More

Title: Resurgence, Phase Transitions & Extrapolation Abstract: There are several important conceptual and computational questions in quantum field theory which have recently been approached from a new perspective motivated by “resurgent asymptotics”, which is a novel mathematical formalism that… Read More

Title: Black Holes and How They Might Be Sources of New Physics Abstract: Particle theorists using string theory have ideas about black holes but encountered various problems and contradictions. However, considering standard physics and some straightforward extrapolations leads to a clearer picture. Black holes seem to tell us not only important things about particle… Read More