@article{2012-spethmann-widera-phys-rev-lett-v109-p235301,
	Abstract = {We report on controlled doping of an ultracold Rb gas with single neutral Cs impurity atoms. Elastic two-body collisions lead to a rapid thermalization of the impurity inside the Rb gas, representing the first realization of an ultracold gas doped with a precisely known number of impurity atoms interacting via s-wave collisions. Inelastic interactions are restricted to a single three-body recombination channel in a highly controlled and pure setting, which allows to determine the Rb-Rb-Cs three-body loss rate with unprecedented precision. Our results pave the way for a coherently interacting hybrid system of individually controllable impurities in a quantum many-body system.},
	Author = {Spethmann, N. AND Kindermann, F. AND John, S. AND Weber, C. AND Meschede, D. AND Widera, A.},
	Journal = {Phys. Rev. Lett.},
	Pages = {235301},
	Title = {{Dynamics of single neutral impurity atoms immersed in an ultracold gas}},
	Volume = {109},
	Year = {2012}
}