From Self-Dual to Physical $\mathbb{C}{P}^{N-1}$: Anomalies, Boundary Stokes Phenomenon, and Global Structure of $\theta$-vacua

Yui Hayashi, Mithat Ünsal

We introduce a two-coupling generalization of $\mathbb{C}{P}^{N-1}$ model that continuously interpolates between the self-dual ($\epsilon =0$) and the physical ($\epsilon =g$) theories as a useful n…