Speaker
Silviu Pufu
Description
50 years ago, Coleman introduced two-dimensional quantum electrodynamics coupled to two charged massive fermions. While he elucidated much of the physics of this model, he listed three puzzles at the end of his paper. In this talk, I will present new analytical and numerical calculations that help solve these three puzzles. The analytical computations use two-loop RG, integrability, and effective field theory methods. The numerical computations use infinite matrix product states, and a new kind of matrix product operators called LEMPOs with which one can simulate two-dimensional gauge theories more efficiently.