Quantum degenerate mixtures of strontium and rubidium atoms

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 techni...

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Bibliographic Details
Published inarXiv.org
Main Authors Pasquiou, Benjamin, Bayerle, Alex, Tzanova, Slava, Stellmer, Simon, Szczepkowski, Jacek, Parigger, Mark, Grimm, Rudolf, Schreck, Florian
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 25.05.2013
Subjects
Bose-Einstein condensates
Cooling
Evaporative cooling
Gas mixtures
Helium
Laser cooling
Physics - Atomic Physics
Physics - Quantum Gases
Rubidium
Space density
Strontium
Strontium 88
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1305.5935