Observation and control of dynamics under electric dipole-dipole interaction in a Bose Einstein condensate

• Project/Area Number: 15K17730
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Institute for Molecular Science
• Principal Investigator: TAKEDA Shuntaro 分子科学研究所, 光分子科学研究領域, 助教 (80737304)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 冷却原子 / レーザー冷却 / ボース・アインシュタイン凝縮体 / リュードベリ原子 / ポンプ・プローブ法

Outline of Final Research Achievements

Quantum degenerate gases generated by laser cooling are useful quantum systems for simulating origins of physical functionalities in real materials and finding novel quantum many-body phenomena. In this project, we first succeeded in generating a Bose-Einstein condensate of rubidium atoms. Pulsed laser excitation of these atoms to Rydberg states lead to a quantum degenerate gas in which atoms strongly interact with each other through their electric dipoles. We also succeeded in observing dynamics of the gas under the interaction.

Research Products

• [Int'l Joint Research] ハイデルベルク大学(ドイツ)
• [Int'l Joint Research] ストラスブール大学(フランス)
• [Int'l Joint Research] インスブルック大学(オーストリア)
• [Journal Article] Time domain Ramsey interferometry with interacting Rydberg atoms (2016)
  • Author(s): Christian Sommer, Guido Pupillo, Nobuyuki Takei, Shuntaro Takeda, Akira Tanaka, Kenji Ohmori, and Claudiu Genes
  • Journal Title: Physical Review A Volume: 94 Issue: 5 Pages: 053607-053607
  • DOI: 10.1103/physreva.94.053607
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 超高速量子シミュレーターの実現に向けた87Rb原子のunit fillingモット絶縁体の生成 (2017)
  • Author(s): 武田俊太郎, 田中陽, 溝口道栄, 武井宣幸, Christian Sommer, 子安邦明, 千葉寿, 大森賢治
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学（大阪府豊中市）
  • Year and Date: 2017-03-17
• [Presentation] 超高速量子シミュレーターの実現に向けた光格子中の87Rb原子の超流動―モット絶縁体相転移の観測 (2017)
  • Author(s): 田中陽，溝口道栄，武田俊太郎，武井宣幸，Christian Sommer，子安邦明，千葉寿，岸本哲夫, 大森賢治
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学（大阪府豊中市）
  • Year and Date: 2017-03-17
• [Presentation] 光格子中における87Rb原子集団の超流動‐モット絶縁体転移点を横切るクエンチダイナミクス (2017)
  • Author(s): 溝口道栄，武田俊太郎，田中陽，武井宣幸，Christian Sommer，子安邦明，千葉寿，大森賢治
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学（大阪府豊中市）
  • Year and Date: 2017-03-17
• [Presentation] Ultra-high vacuum system for probing many-body dynamics of Rydberg wave-packets in an optical lattice (2016)
  • Author(s): Akira Tanaka, Shuntaro Takeda, Nobuyuki Takei, Christian Sommer, Michiteru Mizoguchi, Kuniaki Koyasu, Claudiu Genes, Guido Pupillo, Matthias Weidemueller, Hisashi Chiba, and Kenji Ohmori
  • Organizer: 1st International Symposium on Advanced Photonics
  • Place of Presentation: ホテル九重（静岡県浜松市）
  • Year and Date: 2016-04-13
  • Int'l Joint Research
• [Presentation] All-optical generation of a 87Rb Bose-Einstein condensate for probing many-body dynamics of Rydberg wave-packets in an optical lattice (2016)
  • Author(s): Michiteru Mizoguchi, Shuntaro Takeda, Akira Tanaka, Nobuyuki Takei, Christian Sommer, Kuniaki Koyasu, Claudiu Genes, Guido Pupillo, Hisashi Chiba, Matthias Weidemueller, and Kenji Ohmori
  • Organizer: 1st International Symposium on Advanced Photonics
  • Place of Presentation: ホテル九重（静岡県浜松市）
  • Year and Date: 2016-04-13
  • Int'l Joint Research
• [Presentation] 3ビーム交差型光双極子トラップを用いた全光学的手法による87Rb原子のBEC生成 (2016)
  • Author(s): 武田俊太郎, 田中陽, 武井宣幸, Christian Sommer, 溝口道栄, 子安邦明, 千葉寿, 大森賢治
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学（宮城県仙台市）
  • Year and Date: 2016-03-19
• [Presentation] Ultrafast many-body electron dynamics of Rydberg atoms in disordered and ordered systems (2015)
  • Author(s): S. Takeda, A. Tanaka, N. Takei, C. Sommer, C. Genes, G. Pupillo, H. Goto, K. Koyasu, H. Chiba, M. Weidemueller, and K. Ohmori
  • Organizer: Gordon Research Conferences: Atomic Physics
  • Place of Presentation: Newport (USA)
  • Year and Date: 2015-06-14
  • Int'l Joint Research
• [Remarks] All-optical BEC in Okazaki, Japan
  • URL: https://ucan.physics.utoronto.ca/News/report.2015-06-08.8920876916/view
• [Remarks] 全光学的手法によるRb原子のボーズアインシュタイン凝縮の生成に成功
  • URL: https://groups.ims.ac.jp/organization/ohmori_g/bec.html
• [Remarks] 3次元光格子中での超流動‐Mott絶縁体量子相転移の観測に成功
  • URL: https://groups.ims.ac.jp/organization/ohmori_g/lattice.html
• [Remarks] Rb原子のunit-filling Mott絶縁体の生成に成功
  • URL: https://groups.ims.ac.jp/organization/ohmori_g/unitfilling.html