Browsing by Author "Wolf, Alexander"

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    Perspective on quantum bubbles in microgravity
    Lundblad, Nathan; Aveline, David C.; Balaž, Antun; Bentine, Elliot; Bigelow, Nicholas P.; Boegel, Patrick; Efremov, Maxim A.; Gaaloul, Naceur; Meister, Matthias; Olshanii, Maxim; Sá de Melo, Carlos A. R.; Tononi, Andrea; Vishveshwara, Smitha; White, Angela C.; Wolf, Alexander; Garraway, Barry M.
    Progress in understanding quantum systems has been driven by the exploration of the geometry, topology, and dimensionality of ultracold atomic systems. The NASA Cold Atom Laboratory (CAL) aboard the International Space Station has enabled the study of ultracold atomic bubbles, a terrestrially-inaccessible topology. Proof-of-principle bubble experiments have been performed on CAL with an radiofrequency-dressing technique; an alternate technique (dual-species interaction-driven bubbles) has also been proposed. Both techniques can drive discovery in the next decade of fundamental physics research in microgravity.
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    Shell-shaped Bose-Einstein condensates based on dual-species mixtures
    Wolf, Alexander; Boegel, Patrick; Meister, Matthias; Balaž, Antun; Gaaloul, Naceur; Efremov, Maxim A.
    Ultracold quantum gases confined in three-dimensional bubble traps are promising tools for exploring many -body effects on curved manifolds. As an alternative to the conventional technique of radio-frequency dressing, we propose to create such shell-shaped Bose-Einstein condensates in microgravity based on dual-species atomic mixtures, and we analyze their properties as well as the feasibility of realizing symmetrically filled shells. Beyond similarities with the radio-frequency dressing method, as in the collective excitation spectrum, our approach has several natural advantages like the robustness of the created quantum bubbles and the possibility of magnifying shell effects through an interaction-driven expansion.