Spin-dependent inelastic collisions in spin-2 Bose-Einstein condensates

Journal Article · Thu Oct 15 04:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.042704· OSTI ID:21316409

Tojo, Satoshi; Hayashi, Taro; Tanabe, Tatsuyoshi; Hirano, Takuya ^[1]; Kawaguchi, Yuki ^[2]; Saito, Hiroki ^[3]; Ueda, Masahito ^[2]

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1. Department of Physics, Gakushuin University, Tokyo 171-8588 (Japan)
2. Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)
3. Department of Applied Physics and Chemistry, University of Electro-Communications, Tokyo 182-8585 (Japan)

We studied spin-dependent two-body inelastic collisions in F=2 {sup 87}Rb Bose-Einstein condensates both experimentally and theoretically. The {sup 87}Rb 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. The measured atom loss rates depend on the spin states of colliding atoms. We measured two fundamental loss coefficients for two-body inelastic collisions with total spins of 0 and 2. The loss coefficients determine the loss rates of all the spin pairs. The experimental results for mixtures of all spin combinations are in good agreement with numerical solutions of the Gross-Pitaevskii equations that include the effect of a magnetic field gradient.

• OSTI ID: 21316409
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 80; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOM-ATOM COLLISIONS
ATOMS
BOSE-EINSTEIN CONDENSATION
EQUATIONS
LOSSES
MAGNETIC FIELDS
NUMERICAL SOLUTION
RADIATION PRESSURE
RUBIDIUM
RUBIDIUM 87
SPIN
TWO-BODY PROBLEM