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arXiv:1305.7091 · Journal of Physics B Atomic Molecular and Optical Physics

A double species 23 Na and 87 Rb Bose–Einstein condensate with tunable miscibility via an interspecies Feshbach resonance

Fudong Wang, Xiaoke Li, Dezhi Xiong, Dajun Wang

Published Nov 24, 2015• 88 citations
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Abstract

Abstract We have realized a dual-species Bose–Einstein condensate (BEC) of 23 Na and 87 Rb atoms and observed its immiscibility. Because of the favorable background intra- and inter-species scattering lengths, stable condensates can be obtained via efficient evaporative cooling and sympathetic cooling without the need for fine tuning of the interactions. Our system thus provides a clean platform for studying inter-species interactions–driven effects in superfluid mixtures. With a Feshbach resonance, we have successfully created double BECs with largely tunable inter-species interactions and studied the miscible–immiscible phase transition.

DOI
10.1088/0953-4075/49/1/015302

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Abstract We have realized a dual-species Bose–Einstein condensate (BEC) of 23 Na and 87 Rb atoms and observed its immiscibility. Because of the favorable background intra- and inter-species scattering lengths, stable condensates can be obtained via efficient evaporative cooling and sympathetic cooling without the need for fine tuning of the interactions. Our system thus provides a clean platform for studying inter-species interactions–driven effects in superfluid mixtures. With a Feshbach resonance, we have successfully created double BECs with largely tunable inter-species interactions and studied the miscible–immiscible phase transition.
A 23^{23}23Na and 87^{87}87Rb double Bose-Einstein condensate with tunable interactions
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Dual-species Bose-Einstein condensates of 23^{23}23Na and 41^{41}41K with tunable interactions
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