2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18513Using the two-dimensional Jordan-Wigner fermionization we calculate the thermodynamic quantities of the (spatially anisotropic) square-lattice spin-1/2 anisotropic XY (XZ) model. We compare the results of different approaches for the ground-state and thermodynamic properties of the model.5 pages, 2 figuresCondensed Mattertext