2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/218770Motivated 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.20 pages, 1 figureHigh Energy Physics - LatticeStatistical MechanicsHigh Energy Physics - Theorytext