Journal
PHYSICAL REVIEW A
Volume 80, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.80.042704
Keywords
atom-atom collisions; Bose-Einstein condensation; radiation pressure; rubidium; spin systems
Categories
Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [17071005, 19740248, 20540388]
- CREST, JST
- Grants-in-Aid for Scientific Research [19740248] Funding Source: KAKEN
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We studied spin-dependent two-body inelastic collisions in F=2 Rb-87 Bose-Einstein condensates both experimentally and theoretically. The Rb-87 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.
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