2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219529We investigate the properties of S=1/2 Heisenberg clusters with random frustration using exact diagonalizations. This is a model for a quantum spin glass. We show that the average ground state spin is $S \propto \sqrt{N}$, where N is the number of sites. We also calculate the magnetic susceptibility and the spin stiffness and low-energy excitations, and discuss these in terms of a semiclassical picture.4 pages, 3 figures, 2 tablesStrongly Correlated ElectronsDisordered Systems and Neural Networkstext