Ultracold 87Rb Ground-State Hyperfine-Changing Collisions in the Presence and Absence of Laser Light
S D. Gensemer, P L. Gould, P J. Leo, Eite Tiesinga, Carl J. Williams
We have measured the rate of hyperfine-changing collisions between ground-state 87Rb atoms in a magneto-optical trap. Using a population switching technique, we are able to directly measure the rate of these collisions in the dark. In the presence of near-resonant trapping laser light, we observe a dramatic enhancement of the trap loss collision rate. Measurements made in the dark over a range of temperatures show a ground state hyperfine changing collision rate which increases with increasing temperature. There is consistency between this latter measured rate and theoretical calculations constrained by experiments on Bose-Einstein condensates and spectroscopy.
Physical Review A (Atomic, Molecular and Optical Physics)
scattering lengths, ultracold collisions
, Gould, P.
, Leo, P.
, Tiesinga, E.
and Williams, C.
Ultracold <sup>87</sup>Rb Ground-State Hyperfine-Changing Collisions in the Presence and Absence of Laser Light, Physical Review A (Atomic, Molecular and Optical Physics)
(Accessed September 24, 2023)