SQAI-NCTS Joint Workshop 2026

Tensor Renormalization Group Approach to the 2D Classical ANNNI Model: Existence of the Floating Phase

24 Aug 2026, 15:00

20m

Fujiwara Hiroshi Hall, Kyoseikan (Hiyoshi Campus, Keio University, Yokohama, Japan)

Contributed talks

Speaker

Yuto Sugimoto (Tohoku University)

Description

We investigate the two-dimensional classical ANNNI model using the tensor renormalization group method. At finite next-nearest-neighbor interactions, the model is predicted to exhibit a critical phase known as the floating phase. In this study, we employ the bond-weighted tensor renormalization group method to investigate the floating phase. Using bond dimensions up to D=240, together with a finite-size scaling analysis, we explore the phase structure of the two-dimensional classical ANNNI model.