Ground-state properties of a trapped few-boson system under rotation: Beyond the “lowest-Landau-level” approximation

Abstract

We consider a harmonically trapped few-boson system under rotation and investigate the ground-state properties beyond the usual “lowest-Landau-level” approximation by using exact diagonalizations in a restricted Hilbert subspace. We find that both the effective interaction energy and density distribution are strongly affected by the two-body interaction strength.