Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 11: Poster: Quantum Optics and Photonics I

Q 11.3: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

Gray-molasses cooling of ⁶Li towards a double degenerate Bose-Fermi mixture of ¹³³Cs and ⁶Li atoms — •Manuel Gerken, Stephan Häfner, Juris Ulmanis, Eva D. Kuhnle, 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 atoms is an ideal system for the study of the heteronuclear Efimov scenario [1,2] as well as the emergence of polarons due to its large mass imbalance and the tunability of atomic interactions via Feshbach resonances [3]. Here we present our approach to gray-molasses cooling on the D1 line of Li which will be newly implemented in our experiment as a further step after doppler-cooling in the MOT. The process will lead to lower temperatures and higher phase space densities and therefore yield better starting conditions for evaporative cooling of Li. By sympathetically cooling the Cs with Li the generation of a double degenerate Bose-Fermi mixture will be possible.

[1] J. Ulmanis et al., arXiv:1509.05585 (2015)

[2] R. Pires et al., Phys. Rev. Lett. 112, 250404 (2014)

[3] R. Pires et al., Phys. Rev. A 90, 012710 (2014)