title: Collisions between tunable halo dimers: exploring an elementary four-body process with identical bosons.
abstract: We study inelastic collisions in a pure, trapped sample of Feshbach molecules made of bosonic cesium atoms in the quantum halo regime. We measure the relaxation rate coefficient for decay to lower-lying molecular states and study the dependence on scattering length and temperature. We identify a pronounced loss minimum with varying scattering length along with a further suppression of loss with decreasing temperature. Our observations provide insight into the physics of a few-body quantum system that consists of four identical bosons at large values of the two-body scattering length.
authors.affiliation: Institut für Experimentalphysik and Zentrum für Quantenphysik, Universität Innsbruck, 6020 Innsbruck, Austria.
authors.forename: F
authors.initials: F
authors.lastname: Ferlaino
authors.forename: S
authors.initials: S
authors.lastname: Knoop
authors.forename: M
authors.initials: M
authors.lastname: Mark
authors.forename: M
authors.initials: M
authors.lastname: Berninger
authors.forename: H
authors.initials: H
authors.lastname: Schöbel
authors.forename: H-C
authors.initials: HC
authors.lastname: Nägerl
authors.forename: R
authors.initials: R
authors.lastname: Grimm