A double species<sup>23</sup>Na and<sup>87</sup>Rb Bose–Einstein condensate with tunable miscibility via an interspecies Feshbach resonance
Fudong WangDepartment of Physics, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of ChinaXiaoke LiDepartment of Physics, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of ChinaDezhi XiongWuhan Institute of Physics and MathematicsDajun WangDepartment of Physics, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
2015en
ABI
Annotatsiya
We have realized a dual-species Bose-Einstein condensate (BEC) of $^{23}$Na and $^{87}$Rb atoms and observed their 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.
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