2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/113456We calculate the collective modes of a partially polarized Fermi gas trapped in a spherically symmetric harmonic potential. We show that the breathing mode frequency exhibits non-monotonic dependence on polarization in the entire BCS-BEC crossover region. Moreover, we find that the breathing mode can be used to distinguish between two commonly used unitary gas equations of state.4 pages, 2 figuresOther Condensed Mattertext