280 citations · 2.1k across the 25 of their papers we have counts for
12 papers · 1 filter
Non-Invertible Gauss Law and Axions
Yichul Choi, Ho Tat Lam, Shu-Heng Shao
In axion-Maxwell theory at the minimal axion-photon coupling, we find non-invertible 0- and 1-form global symmetries arising from the naive shift and center symmetries. Since the G…
Non-invertible Time-reversal Symmetry
Yichul Choi, Ho Tat Lam, Shu-Heng Shao
In gauge theory, it is commonly stated that time-reversal symmetry only exists at or for a -periodic -angle. In this paper, we point out that in both the free Maxw…
Non-invertible Global Symmetries in the Standard Model
Yichul Choi, Ho Tat Lam, Shu-Heng Shao
We identify infinitely many non-invertible generalized global symmetries in QED and QCD for the real world in the massless limit. In QED, while there is no conserved Noether curren…
Non-invertible Condensation, Duality, and Triality Defects in 3+1 Dimensions
Yichul Choi, Clay Cordova, Po-Shen Hsin +2
We discuss a variety of codimension-one, non-invertible topological defects in general 3+1d QFTs with a discrete one-form global symmetry. These include condensation defects from h…
Non-Invertible Duality Defects in 3+1 Dimensions
Yichul Choi, Clay Cordova, Po-Shen Hsin +2
For any quantum system invariant under gauging a higher-form global symmetry, we construct a non-invertible topological defect by gauging in only half of spacetime. This generalize…
Discrete Theta Angles, Symmetries and Anomalies
Po-Shen Hsin, Ho Tat Lam
Gauge theories in various dimensions often admit discrete theta angles, that arise from gauging a global symmetry with an additional symmetry protected topological (SPT) phase. We…
Anomalies in the Space of Coupling Constants and Their Dynamical Applications II
Clay Cordova, Daniel S. Freed, Ho Tat Lam +1
We extend our earlier work on anomalies in the space of coupling constants to four-dimensional gauge theories. Pure Yang-Mills theory (without matter) with a simple and simply conn…
Anomalies in the Space of Coupling Constants and Their Dynamical Applications I
Clay Cordova, Daniel S. Freed, Ho Tat Lam +1
It is customary to couple a quantum system to external classical fields. One application is to couple the global symmetries of the system (including the Poincaré symmetry) to backg…
Comments on One-Form Global Symmetries and Their Gauging in 3d and 4d
Po-Shen Hsin, Ho Tat Lam, Nathan Seiberg
We study 3d and 4d systems with a one-form global symmetry, explore their consequences, and analyze their gauging. For simplicity, we focus on one-form symmetries. A…
Expanding the Black Hole Interior: Partially Entangled Thermal States in SYK
Akash Goel, Ho Tat Lam, Gustavo J. Turiaci +1
We introduce a family of partially entangled thermal states in the SYK model that interpolates between the thermo-field double state and a pure (product) state. The states are prep…
Shockwave S-matrix from Schwarzian Quantum Mechanics
Ho Tat Lam, Thomas G. Mertens, Gustavo J. Turiaci +1
Schwarzian quantum mechanics describes the collective IR mode of the SYK model and captures key features of 2D black hole dynamics. Exact results for its correlation functions were…
Asymptotic Four Point Functions
Benjamin Basso, Frank Coronado, Shota Komatsu +3
We initiate the study of four-point functions of large BPS operators at any value of the coupling. We do it by casting it as a sum over exchange of superconformal primaries and com…