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Department of Physics

Staff profile

Publication details for Prof Simon Cornish

McCarron, D.J., Cho, H.W., Jenkin, D.L., Koeppinger, M.P. & Cornish, S.L. (2011). Dual-species Bose-Einstein condensate of (87)Rb and (133)Cs. Physical Review A 84(1): 011603.

Author(s) from Durham


We report the formation of a dual-species Bose-Einstein condensate of Rb87 and Cs133 in the same trapping potential. Our method exploits the efficient sympathetic cooling of Cs133 via elastic collisions with Rb87, initially in a magnetic quadrupole trap and subsequently in a levitated optical trap. The two condensates each contain up to 2×104 atoms and exhibit a striking phase separation, revealing the mixture to be immiscible due to strong repulsive interspecies interactions. Sacrificing all the Rb87 during the cooling, we create single-species Cs133 condensates of up to 6×104 atoms.