Dual-Species Bose-Einstein Condensate of $^{87}$Rb and $^{133}$Cs

Details Dual-Species Bose-Einstein Condensate of $^{87}$Rb and $^{133}$Cs Dual-Species Bose-Einstein Condensate of $^{87}$Rb and $^{133}$Cs

2011-02-08

arxiv.org/abs/1102.1576v4

Phys. Rev. A 84, 011603 (2011)

Physics

Atomic Physics

4 pages and 4 figures

Scientific paper

10.1103/PhysRevA.84.011603

We report the formation of a dual-species Bose-Einstein condensate of $^{87}$Rb and $^{133}$Cs in the same trapping potential. Our method exploits the efficient sympathetic cooling of $^{133}$Cs via elastic collisions with $^{87}$Rb, initially in a magnetic quadrupole trap and subsequently in a levitated optical trap. The two condensates each contain up to $2\times10^{4}$ atoms and exhibit a striking phase separation, revealing the mixture to be immiscible due to strong repulsive interspecies interactions. Sacrificing all the $^{87}$Rb during the cooling, we create single species $^{133}$Cs condensates of up to $6\times10^{4}$ atoms.

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