Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-09-02
Phys. Rev. A 80, 042704 (2009)
Physics
Condensed Matter
Quantum Gases
7 pages, 5 figures
Scientific paper
10.1103/PhysRevA.80.042704
We studied spin-dependent two-body inelastic collisions in F=2 87Rb Bose-Einstein condensates both experimentally and theoretically. The 87Rb condensates were confined in an optical trap and selectively prepared in various spin states in the F=2 manifold at a magnetic field of 3.0 G. Measured atom loss rates are found to depend on spin states of colliding atoms. We measured two fundamental loss coefficients for two-body inelastic collisions with the total spin of 0 and 2; the coefficients determine loss rates for all the spin pairs. The experimental results for mixtures of all the spin combinations are in good agreement with numerical solutions of the Gross-Pitaevskii equations that include the effect of a magnetic field gradient.
Hayashi Taro
Hirano Takuya
Kawaguchi Yuki
Saito Hiroki
Tanabe Tatsuyoshi
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