Lattice study of RG fixed point based on gradient flow in $3$D $O(N)$ sigma model

Okuto Morikawa, Mizuki Tanaka, Masakiyo Kitazawa +1

We present the lattice simulation of the renormalization group flow in the $3$-dimensional $O(N)$ linear sigma model. This model possesses a nontrivial infrared fixed point, called…