%0 Journal Article %A Lea Boßmann %A Sören Petrat %A Robert Seiringer %T Asymptotic expansion of low-energy excitations for weakly interacting bosons %J Forum of Mathematics, Sigma %D 2021 %V 9 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1017/fms.2021.22/ %R 10.1017/fms.2021.22 %G en %F 10_1017_fms_2021_22