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arXiv · 1204.6051

Dynamics of single neutral impurity atoms immersed in an ultracold gas

Nicolas Spethmann·Farina Kindermann·Shincy John·Claudia Weber·Dieter Meschede·Artur Widera
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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.

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Nicolas Spethmann, Farina Kindermann, Shincy John, Claudia Weber, Dieter Meschede, Artur Widera. 2012-04-26. Dynamics of single neutral impurity atoms immersed in an ultracold gas. https://doi.org/10.1103/physrevlett.109.235301

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