2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/172234We study a system of one-dimensional (iso)spin-1/2 bosons in the regime of strong repulsive interactions. We argue that the low-energy spectrum of the system consists of acoustic density waves and the spin excitations described by an effective ferromagnetic spin chain with a small exchange constant J. We use this description to compute the dynamic spin structure factor and the spectral functions of the system.reference addedMesoscale and Nanoscale PhysicsOther Condensed Mattertext