Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics II

Q 40.15: Poster

Wednesday, March 8, 2017, 17:00–19:00, P OG2

Gray molasses cooling of ⁶Li towards a double-degenerate ¹³³Cs-⁶Li Bose-Fermi mixture — •Manuel Gerken, Stephan Häfner, Binh Tran, Melina Filzinger, Bing Zhu, Juris Ulmanis, and Matthias Weidemüller — Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany

An ultracold Bose-Fermi mixture of ¹³³Cs and ⁶Li is an ideal system for the study of Efimov’s scenario as well as polarons due to its large mass imbalance and the tunability of intra- and interspecies interactions via Feshbach resonances. Gray molasses on the D1 line of ⁶Li is newly implemented in the experiment as a further cooling step after Doppler cooling in the MOT. We achieve Sub-Doppler temperatures of down to 42 µK with almost unit capture efficiency. This leads to a tenfold improvement in phase-space density and therefore better starting conditions for the generation of a double-degenerate Bose-Fermi mixture.