2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16811Using the numerical approach for a study of the thermodynamic properties of the nonuniform one-dimensional spin-1/2 isotropic XY model in a transverse field we examine different lattice distortions to reveal which spin-Peierls phases are realized in the magnetic chain at zero temperature in the presence of external field.6 pages, latex, 4 figuresCondensed Mattertext