Cosmic string for electromagnetic duality

2 PM, 12 Feb 2026

Shu-Heng Shao analyses twist defects in 4d Maxwell theory, deriving their operator spectrum and a chiral sector from classical wave equations.

Shu-Heng Shao discusses conformal twist defects in 4d Maxwell theory, where electric and magnetic fields exchange roles. He determines their operator spectrum by solving classical wave equations with twisted boundary conditions and shows that defect correlation functions split into universal and chiral current sectors. He also revisits related 2d defects and explores a ’t Hooft anomaly and its dynamical implications.

Dr Shu-Heng Shao is a theoretical physicist at MIT. His research explores structural aspects of quantum field theories and lattice systems, with a focus on non-invertible symmetries, which appear in quantum systems such as the Ising model, Yang-Mills theories and the Standard Model.

Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
LCP
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality
Cosmic string for electromagnetic duality