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arXiv · 1305.5935

Quantum degenerate mixtures of strontium and rubidium atoms

Benjamin Pasquiou·Alex Bayerle·Slava Tzanova·Simon Stellmer·Jacek Szczepkowski·Mark Parigger·Rudolf Grimm·Florian Schreck
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Abstract

We report on the realization of quantum degenerate gas mixtures of the alkaline-earth element strontium with the alkali element rubidium. A key ingredient of our scheme is sympathetic cooling of Rb by Sr atoms that are continuously laser cooled on a narrow linewidth transition. This versatile technique allows us to produce ultracold gas mixtures with a phase-space density of up to 0.06 for both elements. By further evaporative cooling we create double Bose-Einstein condensates of 87Rb with either 88Sr or 84Sr, reaching more than 10^5 condensed atoms per element for the 84Sr-87Rb mixture. These quantum gas mixtures constitute an important step towards the production of a quantum gas of polar, open-shell RbSr molecules.

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Benjamin Pasquiou, Alex Bayerle, Slava Tzanova, Simon Stellmer, Jacek Szczepkowski, Mark Parigger, Rudolf Grimm, Florian Schreck. 2013-05-25. Quantum degenerate mixtures of strontium and rubidium atoms. https://doi.org/10.1103/physreva.88.023601

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