iTHEMS Theoretical Physics Seminar by Nagare Katayama on May 9, 2025

On May 9, Mr. Nagare Katayama gave a seminar hosted by RIKEN iTHEMS. His talk focused on 2d Cardy-Rabinovici model with the modified Villain lattice formulation. One of the most famous scenarios of the quark confinement problem is the dual superconductor picture. In this picture, the quark confinement is induced by monopole condensation. Still, in the theory with a θ term, we expect that monopole and dyon condensation is induced, as suggested by Cardy and Rabinovici through their intuitive arguments. He discussed that the Witten effect of the theory of two-dimensional compact bosons with the θ term is examined using a modified Villain-type lattice theory that can treat the θ term and dion rigorously. In addition, he constructed the 2d Cardy-Rabinovici model and analyzed the phase diagram through the scaling dimension argument and the anomaly matching constraint.

Reported by Okuto Morikawa