Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 18: Poster: Ultra-cold atoms, ions and BEC (with Q)

A 18.7: Poster

Dienstag, 24. März 2015, 17:00–19:00, C/Foyer

Future prospects for trapping a single ion in Bose-Einstein condensates — •Kathrin Kleinbach, Karl Magnus Westphal, Michael Schlagmüller, Huan Nguyen, Fabian Böttcher, Tara Cubel Liebisch, Robert Löw, Sebastian Hofferberth, and Tilman Pfau — 5. Physikalisches Institut, Universität Stuttgart, Stuttgart, Germany

Creating hybrid systems of ions and neutral atoms is of great interest in order to study controlled collision and chemical processes in ultracold temperature regime. There has been exciting progress made with combining ion traps with neutral atom traps, but due to the micromotion of the ion in trap, the ultralow temperature regimes of these hybrid systems still remains out-of-reach. We propose two methods for realizing an ion-neutral hybrid system with Rydberg atoms excited in a Bose-Einstein condensate. The first approach is to excite a single Rydberg atom in the BEC and then promote it into a circular state with a radius on the order of 2µ m, via fast electric field pulses. The electron would then orbit outside of the BEC created with appropriate trap frequencies. The second approach would be to create the single Rydberg impurity in the BEC and then shine focused magic wavelength light on the Rydberg atom, thereby ionizing the electron and trapping the ion. The advantage of the second approach is that the ion could be held for long times and dragged through the BEC to sample various density regimes.