2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/224369We report on precision measurements of the frequency of the radial compression mode in a strongly interacting, optically trapped Fermi gas of Li-6 atoms. Our results allow for a test of theoretical predictions for the equation of state in the BEC-BCS crossover. We confirm recent quantum Monte-Carlo results and rule out simple mean-field BCS theory. Our results show the long-sought beyond-mean-field effects in the strongly interacting BEC regime.improved discussion of small ellipticity and anharmonicity correctionsOther Condensed MatterSuperconductivitytext