24th European Conference on Few-Body Problems in Physics

Elastic scattering of three ultracold bosons

6 Sept 2019, 12:10

20m

University of Surrey

Talk Atoms and Molecules Parallel Session Friday: Atoms and Molecules

Speaker

Paul Mestrom (Eindhoven University of Technology)

Description

Elastic scattering of three bosons at low energy is a fundamental problem in the many-body description of ultracold Bose gases, entering 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 $D$. In particular, we present the first numerical confirmation of the universal predictions for $D$ that are made in the strongly-interacting regime, where Efimov physics dominates, for a local nonzero-range potential. Our findings highlight how finite-range effects, such as $d$-wave interactions, become important as the interaction strength is reduced.

Presentation materials

EFB24_Surrey_Paul_Mestrom_2019_September_6_v3_public.pdf

EFB24_Surrey_Paul_Mestrom_2019_September_6_v3_public.pptx