Controlling phase separation of binary Bose-Einstein condensates via mixed-spin-channel Feshbach resonance
Satoshi TojoDepartment of Physics, Gakushuin University, Tokyo 171-8588, JapanYoshihisa TaguchiDepartment of Physics, Gakushuin University, Tokyo 171-8588, JapanY. MASUYAMADepartment of Physics, Gakushuin University, Tokyo 171-8588, JapanTarō HayashiDepartment of Physics, Gakushuin University, Tokyo 171-8588, JapanHiroki SaitoDepartment of Engineering Science, University of Electro-Communications, Tokyo 182-8585, JapanTakuya HiranoDepartment of Physics, Gakushuin University, Tokyo 171-8588, Japan
2010en
ABI
Abstract
We investigate controlled phase separation of a binary Bose-Einstein condensate in the proximity of a mixed-spin-channel Feshbach resonance in the $|F=1,{m}_{F}=+1\ensuremath{\rangle}$ and $|F=2,{m}_{F}=\ensuremath{-}1\ensuremath{\rangle}$ states of $^{87}\mathrm{Rb}$ at a magnetic field of 9.10 G. Phase separation occurs on the lower-magnetic-field side of the Feshbach resonance while the two components overlap on the higher-magnetic-field side. The Feshbach resonance curve of the scattering length is obtained from the shape of the atomic cloud by comparison with the numerical analysis of coupled Gross-Pitaevskii equations.
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