Mainz 2017 – scientific programme

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A: Fachverband Atomphysik

A 26: Poster Session II

A 26.5: Poster

Wednesday, March 8, 2017, 17:00–19:00, P OG1

Single Cesium Atoms Interacting with an Ultracold Rubidium Bath — •Steve Haupt¹, Daniel Mayer^{1, 2}, Felix Schmidt^{1, 2}, Tobias Lausch¹, Daniel Adam¹, Michael Hohmann¹, Farina Kindermann¹, Nicolas Spethmann¹, and Artur Widera^{1, 2} — ¹Department of Physics, University of Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern , Germany — ²Graduate School Materials Science in Mainz, Gottlieb-Daimler-Str. 42, 67663 Kaiserslautern, Germany

We immerse single neutral Cesium (¹³³Cs) atoms into an ultra cold Rubidium (⁸⁷Rb) cloud and study their dynamics. Tight external control over the Cs atoms’ degrees of freedom as well as high-resolution single atom imaging allows studying various quantum phenomena and applications. This includes cooling dynamics of impurity atoms employed as quantum bits or the realisation of polaronic quasi-particles.

We will review the recent developments in gaining further independent control over the two species, including species-selective optical trapping as well as various measures to deduce the temperature of single atoms. This allows employing single atoms as local, non-destructive temperature probes for an ultracold gas, yielding access to the local thermalisation dynamics within the bath.