Comment on "Evidence for Supersymmetry in the Random-Field Ising Model at D=5''

Ivan Balog, Gilles Tarjus, Matthieu Tissier

Published 2019-06-24Version 1

In a recent letter, Fytas et al. [Phys. Rev. Lett. 122, 240603 (2019)] study the critical point of the equilibrium random-field Ising model (RFIM) in $D=5$ by means of state-of-art zero-temperature lattice simulations. We show that their numerical results concerning the virtual absence of violation of supersymmetry and the characterization of the main corrections to scaling are in full agreement with our predictions by means of a nonperturbative functional renormalization group and with the existence of a critical dimension $D_{DR}\approx 5.1$ above which supersymmetry and dimensional reduction are valid at the fixed point and below which they break down.