Collisions between tunable halo dimers: exploring an elementary four-body process with identical bosons.
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.
Ferlaino
F
F
Institut für Experimentalphysik and Zentrum für Quantenphysik, Universität Innsbruck, 6020 Innsbruck, Austria.
Knoop
S
S
Mark
M
M
Berninger
M
M
Schöbel
H
H
Nägerl
H-C
HC
Grimm
R
R