Response theory for superfluidHe3

We use an expansion in $\frac{T_c}{T_F}$ to study the influence of strong-coupling effects on the linear response of superfluid ${}_{}{}^3{}_{}{}^{}\mathrm{He}$. Our results indicate that the enhancement of the order parameter gives the major strong-coupling corrections to the magnetic susceptibilities, bending energies, and superfluid density. The additional "nontrivial" strong-coupling corrections depend sensitively on currently unknown details of the quasiparticle interactions. Hence, precise measurements of the response coefficients can provide additional information about the quasiparticle interactions.