2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/122820We analyze the entanglement entropy in the Lipkin-Meshkov-Glick model, which describes mutually interacting spins half embedded in a magnetic field. This entropy displays a singularity at the critical point that we study as a function of the interaction anisotropy, the magnetic field, and the system size. Results emerging from our analysis are surprisingly similar to those found for the one-dimensional XY chain.5 pages, 5 figures, published versionStatistical MechanicsHigh Energy Physics - TheoryQuantum Physicstext