Scattering hypervolume for ultracold bosons from weak to strong interactions
arXiv:1905.07205 · doi:10.1103/PhysRevA.100.050702
Abstract
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 . 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 . We present the first numerical confirmation of the universal predictions for in the strongly interacting regime, where Efimov physics dominates, for a local nonzero-range potential. Our findings highlight how is influenced by three-body quasibound states with strong -wave or -wave characteristics in the weakly interacting regime.
arXiv comment13 pages, 8 figures
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