Phase separation and vortex states in binary mixture of Bose-Einstein condensates

Details Phase separation and vortex states in binary mixture of Bose-Einstein condensates Phase separation and vortex states in binary mixture of Bose-Einstein condensates

2000-06-01

arxiv.org/abs/cond-mat/0006024v1

Physics

Condensed Matter

Statistical Mechanics

16 Latex pages, 2 figures

Scientific paper

10.1134/1.1342884

The phase separation and vortex states in two-component Bose-Einstein condensate consisting of $|F=1,m_f=-1>$ and $|2,1>$ internal spin states of $^{87}Rb$ atoms are considered in the framework of Thomas-Fermi approximation. It is shown that in nonrotating system the atoms in the state $|1,-1>$ form a shell about the atoms in the state $|2,1>$. The critical angular velocity for each state is calculated. These velocities are drastically dependent on the mutual concentrations of the components, the critical angular velocity of the outer component being less than the angular velocity of the inner one. It is shown that the atoms in the $|1,-1>$ state can form a rotating ring about the resting core of the atoms in the state $|2,1>$.

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