%0 Journal Article
%T Dynamic Structure Function in 3he-4he Mixtures
%A J. Boronat
%A F. Dalfovo
%A F. Mazzanti
%A A. Polls
%J Physics
%D 1993
%I arXiv
%R 10.1016/0921-4526(94)90759-5
%X Relevant features of the dynamic structure function $S(q,\omega)$ in $^3$He-$^4$He mixtures at zero temperature are investigated starting from known properties of the ground state. Sum rules are used to fix rigorous constraints to the different contributions to $S(q,\omega)$, coming from $^3$He and $^4$He elementary excitations, as well as to explore the role of the cross term $S^{(3,4)}(q,\omega)$. Both the low-$q$ (phonon-roton $^4$He excitations and 1p-1h $^3$He excitations) and high-$q$ (deep inelastic scattering) ranges are discussed.
%U http://arxiv.org/abs/cond-mat/9303005v1