| Project/Area Number |
24654128
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
INOUYE Shin 東京大学, 工学(系)研究科(研究院), 准教授 (10401150)
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| Project Period (FY) |
2012-04-01 – 2013-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | 量子エレクトロニクス / 原子・分子物理 / 低温物性 |
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| Research Abstract |
We performed a photo-association (PA) spectroscopy in order to know precise value of the binding energy of the molecular state. By irradiating a Bose-Einstein condensate of Rubidium 87 with a laser beam whose frequency is red detuned by 240~300GHz from D1 line of Rubidium, we observed three PA resonances whose width were on the order of 10 MHz. By comparing obtained data with literature, we found those resonances correspond to v=188~190 of 0g-. The spatial profile of dual-BEC is sensitive to the mutual scattering length (a12). In order to detect the fast switching of scattering lengths, we developed a method to observe spatial profile of dual-BEC in situ. By setting a12=80.8a0, we observed the two BECs phase separate by exciting modulation instabilities. Observed wavelength of excitation (22(4)um) matches quite well with predictions based on mean-field theory.
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