Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.8: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
The Bose Polaron in an ultracold Bose-Fermi mixture of 133Cs and 6Li — •Melina Filzinger1, Binh Tran1, Manuel Gerken1, Markus Neiczer1, Stephan Häfner1, Bing Zhu1, Matthias Weidemüller1,2, Moritz Drescher3, and Tilman Enss3 — 1Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — 2Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China — 3Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg
An ultracold Bose-Fermi mixture of 133Cs and 6Li is well suited for the investigation of the Bose polaron. In this scenario a single Li impurity is immersed in a Cs BEC and interacts with its phonon excitations, mimicking the Fröhlich polaron problem from solid-state physics. Tuning the sign and strength of the interaction between Li and Cs via Feshbach resonances enables us to study both the repulsive and attractive polaron. We are particularly interested in the study of the quench dynamics of the Bose polaron and the emergence of Efimov physics in its attractive branch.
We give an overview of our experimental approach towards creating and studying the Bose polaron in our system. With an improved imaging system and radiofrequency-setup we are able to manipulate and detect small numbers of Li impurities in a controlled way. Combining our experimental efforts with theoretical investigations of the BEC density profile after a quench, we are aiming to distinguish the Landau-Pekar and bubble polaron.