Scattering hypervolume for ultracold bosons from weak to strong interactions

P.M.A. Mestrom (Corresponding author), V.E. Colussi, T. Secker, S.J.J.M.F. Kokkelmans

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The elastic scattering properties of three bosons at low energy enter the many-body description of ultracold Bose gases via the three-body scattering hypervolume D. We study this quantity for identical bosons that interact via a pairwise finite-range potential. Our calculations cover the regime from strongly repulsive potentials towards attractive potentials supporting multiple two-body bound states and are consistent with the few existing predictions for D. We present a numerical confirmation of the universal predictions for D in the strongly interacting regime, where Efimov physics dominates, for a local nonzero-range potential. Our findings highlight how D is influenced by three-body quasibound states with strong d-wave or g-wave characteristics in the weakly interacting regime.

Original languageEnglish
Article number050702
Number of pages6
JournalPhysical Review A
Issue number5
Publication statusPublished - 21 Nov 2019


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