%0 Journal Article
%T Single Cs Atoms as Collisional Probes in a large Rb Magneto-Optical Trap
%A Claudia Weber
%A Shincy John
%A Nicolas Spethmann
%A Dieter Meschede
%A Artur Widera
%J Physics
%D 2010
%I arXiv
%R 10.1103/PhysRevA.82.042722
%X We study cold inter-species collisions of Caesium and Rubidium in a strongly imbalanced system with single and few Cs atoms. Observation of the single atom fuorescence dynamics yields insight into light-induced loss mechanisms, while both subsystems can remain in steady-state. This significantly simplifies the analysis of the dynamics, as Cs-Cs collisions are effectively absent and the majority component remains unaffected, allowing us to extract a precise value of the Rb-Cs collision parameter. Extending our results to ground state collisions would allow to use single neutral atoms as coherent probes for larger quantum systems.
%U http://arxiv.org/abs/1010.1087v1