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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics II
Q 42.8: Poster
Mittwoch, 13. März 2019, 16:15–18:15, S Atrium Informatik
Efficient creation of a molecular Bose-Einstein condensate of Lithium-6 using a spatially modulated dipole trap — •Manuel Gerken1, Markus Neiczer1, Binh Tran1, Eleonora Lippi1, Stephan Häfner1, Bing Zhu1,2, and Matthias Weidemüller1,2 — 1Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — 2Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
An ultracold Bose-Fermi mixture of 133Cs and 6Li is an interesting system for the study of ground state polar molecules due to the large electric dipole moment as well as for the investigation of polarons because of the large mass imbalance and the tuneability of intra- and interspecies interactions. For these studies reaching a doubly degenerate quantum gas is a favorable experimental condition. We design a new cooling and trapping scheme for 6Li which combines a time averaged crossed dipole trap and gray molasses cooling, improving the starting conditions by a factor of 12 in phase-space density compared to previous conditions. We discuss adiabatic potential shape changes and the creation of a molecular Bose-Einstein condensate of 6Li with up to 3× 105 molecules and a condensate fraction of up to 70%. The enhanced phase space density of 6Li atoms allows for sympathetic cooling of 133Cs, aiming for double degeneracy.