| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2012: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2011: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
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| Outline of Final Research Achievements |
The goal of the project was to produce a quantum degenerate gas of KRb molecules from a dual Bose-Einstein condensate, which is made of rubidium and potassium atoms. By sweeping the magnetic field across a Feshbach resonance, it is possible to produce ultracold molecules from pairs of ultracold atoms. However, the enhancement of interaction between two atoms at Feshbach resonance also causes an enhancement of interaction between three atoms, which results in resonant loss feature called "Efimov resonance". We measured inelastic loss caused by atom-atom scattering and atom-molecule scattering, and succeeded in observing a resonant loss feature in the latter. The data is now used by theory groups for constructing a theory for Efimov resonance for hetero-nuclear systems.
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