High precision Monte Carlo simulations of interfaces in the   three-dimensional Ising model: a comparison with the Nambu-Goto effective   string model
  Motivated by the recent progress in the effective string description of the interquark potential in lattice gauge theory, we study interfaces with periodic boundary conditions in the three-dimensional Ising model. Our Monte Carlo results for the associated free energy are compared with the next-to-leading order (NLO) approximation of the Nambu-Goto string model. We find clear evidence for the validity of the effective string model at the level of the NLO truncation. 
Michele Caselle, Martin Hasenbusch and Marco Panero