356 citations · 2.7k across the 47 of their papers we have counts for
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Topological Terms and Phases of Sigma Models
Ryan Thorngren
We study boundary conditions of topological sigma models with the goal of generalizing the concepts of anomalous symmetry and symmetry protected topological order. We find a versio…
Intrinsic and emergent anomalies at deconfined critical points
Max A. Metlitski, Ryan Thorngren
It is well known that theorems of Lieb-Schultz-Mattis type prohibit the existence of a trivial symmetric gapped ground state in certain systems possessing a combination of internal…
Comments on Abelian Higgs Models and Persistent Order
Zohar Komargodski, Adar Sharon, Ryan Thorngren +1
A natural question about Quantum Field Theory is whether there is a deformation to a trivial gapped phase. If the underlying theory has an anomaly, then symmetric deformations can…
Fermionic SPT phases in higher dimensions and bosonization
Anton Kapustin, Ryan Thorngren
We discuss bosonization and Fermionic Short-Range-Entangled (FSRE) phases of matter in one, two, and three spatial dimensions, emphasizing the physical meaning of the cohomological…