Speaker
Johannes Kirscher
(The University of Manchester)
Description
We trace the perturbative refinement of the two-boson interaction -- which augments an initial, unitary description by a finite effective range -- up to the six-boson system. Hereby, we expose a significant dependence of the predicted ground-state energies of tetra-, penta-, and hexameres on details of the interaction which is resolved at distances much smaller than the effective range. We demonstrate how to remove this sensitivity from all $\leq 6$-boson systems numerically and semi-analytically with a single four-body contact parameter.
Primary author
Johannes Kirscher
(The University of Manchester)
