Search for dark matter axion with Rydberg atoms

• Project/Area Number: 20340054
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Japan Atomic Energy Agency (2010); Kyoto University (2008-2009)
• Principal Investigator: IMAI Kenichi 独立行政法人日本原子力研究開発機構, 先端基礎研究センター, 研究員 (70025493)
• Co-Investigator(Kenkyū-buntansha): MATSUBARA Akira 京都大学, 低温科学研究センター, 准教授 (00229519)
• Co-Investigator(Renkei-kenkyūsha): MATSUKI Seisi 立命館大学, 総合理工学研究機構, 研究員 (50037941) ; SAWADA Anju 京都大学, 低温科学研究センター, 教授 (90115577) ; FUNAHASHI Haruhiko 京都大学, 人間環境学研究科, 教授 (00283581) ; YAMAMOTO Katsuji 京都大学, 工学研究科, 教授 (90191395)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000); Fiscal Year 2010: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2009: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000); Fiscal Year 2008: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
• Keywords: ダークマター / アクシオン / リュードベリ原子 / マイクロ波 / Rydberg原子 / 極低温 / 素粒子

Research Abstract

Axion is an unkown particle and a candidate of the dark matter in the universe. We have constructed a high sensitivity micro-wave detector with use of Rydberg atoms for the detection of a dark matter axion. It consists of a superconducting magnet, a dilution refrigerator and high-precision laser system to detect a micro-wave photon converted from an axion. We have measured energy levels of Rydberg states for K atoms, and made the whole detector system ready for the search of dark matter axion. We have also found a new method to greatly improve S/N of axion search which utilize a cooled and bunched beam of Rydberg atoms.

Research Products

• [Journal Article] Improving the Detection Sensitivity of Dark-Matter Axion Search with a Rydberg-Atom Single-Photon Detector (2010)
  • Author(s): M.Saeed, K.Imai, A.Matsubara, et al.
  • Journal Title: Proc.Of Int.workshop on Fundamental Physics using Atoms Volume: 1 Pages: 69-73
• [Journal Article] A High Sensitivity Microwave Single-Photon Detector with Rydberg Atoms at Low Temperature (2008)
  • Author(s): T. Haseyama, T. Arai, A. Fukuda, H. Funahashi, S. Ikeda, K. Imai, Y. Isozumi, T. Kato, Y. Kido, A. Matsubara, S. Matsuki, T. Mizusaki, TNishimura, D. Ohsawa, A. Sawada, Y. Takahashi, M. Tosaki, K. Yamamoto
  • Journal Title: Journal of Low Temperature Physics Volume: 150 Pages: 549-554
• [Journal Article] Practical Design for Improving the Sensitivity to Search for Dark Matter Axions with Rydberg Atoms (2008)
  • Author(s): M. Shibata, T. Arai, A. Fukuda, H. Funahashi, K. Imai, Y. Isozumi, T. Kato, Y. Kido, A. Matsubara, S. Matsuki, T. Mizusaki, T. Nishimura, D. Ohsawa, A. Sawada, Y. Takahashi, M. Tosaki, K. Yamamoto
  • Journal Title: Journal of Low Temperature Physics Volume: 151 Pages: 1043-1048
• [Presentation] A bunched atomic-beam scheme with laser compression to improve the detection sensitivity in a Rydberg-atom dark-matter axion detector (2011)
  • Author(s): M. Saeed
  • Organizer: Symposium on Low Temperature Physics and Materials Sciences
  • Place of Presentation: Kyoto University, Kyoto
  • Year and Date: 2011-03-14
• [Presentation] A bunched atomic-beam scheme with laser compression to improve the detection sensitivity in a Rydberg-atom dark-matter axion detector (2011)
  • Author(s): M.Saeed, K.Imai, A.Matsubara, et al.
  • Organizer: Low Temperature and Materials Sciences Symposium
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2011-03-14
• [Presentation] A bunched atomic-beam scheme with laser compression to improve the detection sensitivity in a Rydberg-atom dark-matter axion detector (2011)
  • Author(s): M. Saeed
  • Organizer: GCOE symposium
  • Place of Presentation: Kyoto university
• [Presentation] Present Status of Dark Matter Axion Search (2010)
  • Author(s): Haruhiko Funahashi
  • Organizer: Symposium on Low Temperature Physics and Materials Sciences
  • Place of Presentation: Kyoto University, Kyoto
  • Year and Date: 2010-03-15
• [Presentation] Improving the Detection Sensitivity of Dark-Matter Axion Search with a Rydberg-Atom Single-Photon Detector (2010)
  • Author(s): M. Saeed
  • Organizer: 4^<th> International Workshop on Fundamental Physics Using Atoms 2010
  • Place of Presentation: Osaka University
• [Presentation] Search for dark Matter Axion with Rydberg Atoms (2009)
  • Author(s): Kenichi. Imai
  • Organizer: US-Japan joint meeting of physical society on nuclear physics
  • Place of Presentation: Hawaii
  • Year and Date: 2009-10-16
• [Presentation] Improving detection sensitivity in the Rydberg-atom single-photon detector for the dark matter axion search (2009)
  • Author(s): S. Matsuki
  • Organizer: Symposium on Low Temperature Physics and Materials Sciences
  • Place of Presentation: Kyoto University, Kyoto
• [Presentation] Search for dark matter axion with Rydberg atom (2009)
  • Author(s): Kenichi Imai
  • Organizer: 日米合同物理学会 (核物理分科会)
  • Place of Presentation: ハワイ (米国)
• [Presentation] Search for Dark Matter Axion with Rydberg Atom (2008)
  • Author(s): 今井憲一
  • Organizer: International Conference on Paticles and Nuclei (PANIC08)
  • Place of Presentation: Eilat, Israel
  • Year and Date: 2008-11-12
• [Presentation] Search for dark matter axion with Rydberg atoms (2008)
  • Author(s): Kenichi. Imai
  • Organizer: International Conference on Particle and Nuclear Physics
  • Place of Presentation: Israel
  • Year and Date: 2008-11-10
• [Presentation] リドベルグ原子を用いたアクシオン探索実験 (2008)
  • Author(s): 中西玲於奈(Reona Nakanishi)
  • Organizer: 2^<nd> Fundamental Physics using Atoms
  • Place of Presentation: 東北大学(仙台)
  • Year and Date: 2008-08-18
• [Presentation] Measurement of K^^<39> Stark effect for the axion search (2008)
  • Author(s): 中西玲於奈(Reona Nakanishi)
  • Organizer: Workshop on Low Temperature Physics Japan-France Joint Project on the development of dark matter detectors by applying state-of-art ultra low temperature instrumentation
  • Place of Presentation: Kyoto
  • Year and Date: 2008-04-12
• [Presentation] Potassiumリドベルグ原子によるマイクロ波単-光子検出とダークマターアクシオン探索 (2008)
  • Author(s): 池田真也(Shinya Ikeda)
  • Organizer: Symposium on Low Temperature Physics and Materials Sciences
  • Place of Presentation: Kyoto University, Kyoto
  • Year and Date: 2008-03-15
• [Presentation] Improving Detection Sensitivity in the Microwave Single-Photon Detection for the Dark Matter Axion Search (2008)
  • Author(s): Takao Mizusaki
  • Organizer: International Conference on Low Temperature Physics(LT-25), Leiden Institute for Physics
  • Place of Presentation: Leiden University, Netherland
• [Remarks] "総力戦で初期宇宙に取り組む"日経サイエンス2010年6月号p. 76-91(参照1)や京都新聞のインタビュー記事2010年2月20日での紹介がある。