Creation of the quantum cat state by using the collisional interaction of Bose-Einstein condensate and estimation of the quantum state
| Project/Area Number |
20340103
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
KOZUMA Mikio Tokyo Institute of Technology, 大学院・理工学研究科, 准教授 (10302837)
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| Co-Investigator(Renkei-kenkyūsha) |
HONDA Kazuhito 東京工業大学, 大学院・理工学研究科, 助教 (70408706)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2010: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2009: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2008: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
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| Keywords | 量子情報 / ボース凝縮 / 猫状態 / レーザー冷却 / スピンスクイーズ / ルビジウム / スピンスクーズ |
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| Research Abstract |
The purpose of the research is to create the quantum cat state with Bose-Einstein condensate of neutral atomic gas. We constructed the ultra high vacuum system to operate the double magneto-optical trapping and also made the clover-leaf type of the magnetic trap. While the Bose-Einstein condensate of ^<87>Rb atoms was successfully created, it was hard to suppress the residual magnetic field less than 10μG because of the magnetization of the shield box caused by the magnetic trap. We thus started constructing a new setup which creates Bose-Einstein condensate by using only optical trapping technique. We succeeded in constructing a YVO_4 laser with its wavelength of 1.06μm and its power of 10W. Introducing the output power of the YVO_4 laser into the Bow-tie cavity which includes the vacuum glass cell, we succeeded in creating the optical trap whose potential depth is enough deep to catch the laser cooled Rb atoms. It is noted that the system is already surrounded by the magnetic shield and we can keep ultra low residual magnetic field under the operation of the double magneto-optical trapping. The residual magnetic field is less than 10μG and the magnetic gradient is suppressed to 2uG/cm. We are planning to implement our initial purpose by using these experimental setups soon
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Report
(4 results)
Research Products
(21 results)
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[Journal Article]2010
Author(s)
Y.Eto, A.Noguchi, P.Zhang, M.Ueda, M.Kozuma
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Journal Title
Phys.Rev.Lett. 106
Pages: 160501-160501
Related Report
Peer Reviewed
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[Journal Article]2010
Author(s)
M.Takeuchi, N.Takei, K.Doi, P.Zhang, M.Ueda, M.Kozuma
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Journal Title
Phys.Rev.A 81
Pages: 62308-62308
Related Report
Peer Reviewed
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[Journal Article]2010
Author(s)
N.Takei, M.Takeuchi, Y.Eto, A.Noguchi, P.Zhang, M.Ueda, M.Kozuma
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Journal Title
Phys.Rev.A 81
Pages: 42331-42331
Related Report
Peer Reviewed
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[Journal Article]2010
Author(s)
M.Arikawa, K.Honda, D.Akamatsu, S.Nagatsuka, K.Akiba, A.Furusawa, M.Kozuma
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Journal Title
Related Report
Peer Reviewed
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[Journal Article]2009
Author(s)
R.Inoue, T.Yonehara, Y.Miyamoto, M.Koashi, M.Kozuma
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Journal Title
Phys.Rev.Lett. 103
Pages: 110503-110503
Related Report
Peer Reviewed
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[Presentation] Toward 87Rb BEC at zero magnetic field2011
Author(s)
S.Nagaoka, Y.Yamamoto, M.Nakada, Y.Kasahara, K.Honda, M.Kozuma
Organizer
ERATO Macroscopic Quantum Control Conference on Ultra cold Atoms and Molecules (UCAM2011), PS-30
Place of Presentation
Tokyo, Japan
Year and Date
2011-01-24
Related Report
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