Grassmann Tensor Renormalization Group for two-flavor massive Schwinger model with a theta term

Hayato Kanno, Shinichiro Akiyama, Kotaro Murakami +1

We investigate the $N_f=2$ Schwinger model with the massive staggered fermions in the presence of a $2\pi$ periodic $\theta$ term, using the Grassmann tensor renormalization group. Thanks…