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Bose-Einstein condensation with tunable interactions: from solitons to molecules

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The use of magnetic-field-induced Feshbach resonances between collisions of ultracold atoms has revolutionized the field of quantum degenerate gases, permitting both the exquisite control of the atomic interactions and the coupling of free atoms into weakly bound molecular states. In two different Bose-Einstein condensation experiments, we explore these complementary avenues of research. The first experiment uses a quantum degenerate mixture of Rb and Cs with the goal of creating ultracold heteronuclear molecules. The second experiment focuses on the formation of bright matter wave solitons using a condensate with attractive interactions and aims to use such solitons to probe the weak forces between an atom and a surface. This talk will give an overview of both of these projects highlighting our recent results.

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