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Recent experimental advances in ultra-cold Fermi gases allow for exploringresponse functions under different dynamical conditions. In particular, theissue of obtaining a "quasi-repulsive" regime starting from a Fermi gas with anattractive inter-particle interaction while avoiding the formation of thetwo-body bound state is currently debated. Here, we provide a calculation ofthe density and spin response for a wide range of temperature and coupling bothin the attractive and quasi-repulsive regime, whereby the system is assumed toevolve non-adiabatically toward the "upper branch" of the Fermi gas. Acomparison is made with the available experimental data for these twoquantities.

Density and spin response of a strongly-interacting Fermi gas in the attractive and quasi-repulsive regime