Cooling of a massive pendulum to its ground state for test of generalized uncertainty principle

• Project/Area Number: 15H05444
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tohoku University
• Principal Investigator: MATSUMOTO Nobuyuki 東北大学, 学際科学フロンティア研究所, 助教 (30750294)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥23,920,000 (Direct Cost: ¥18,400,000、Indirect Cost: ¥5,520,000); Fiscal Year 2017: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000); Fiscal Year 2016: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000); Fiscal Year 2015: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
• Keywords: フィードバック冷却 / オプトメカニクス / 変位計測 / 重力波 / 量子重力 / 巨視的振動子 / 光学トラップ / 機械光学系 / 不確定性関係 / プランクスケール / 基底状態 / 三角光共振器 / 巨視的量子力学 / 光トラップ / 光計測 / 機械振動子 / 光制御 / 基礎物理学 / 機械光学

Outline of Final Research Achievements

We developed an optical triangular cavity with a suspended mg-scale mirror for cooling the mirror's center-of-mass motion to its ground state. As a result, our system operates within a factor of 50 of the free-mass standard quantum limit, providing a displacement sensitivity of 5e-17 m/sqrt(Hz)@1 kHz. It may be possible to test a minimal length scale by interacting a pulse of light with such a massive oscillator prepared in its motional ground state.

Research Products

• [Journal Article] Optical levitation of a mirror for reaching the standard quantum limit (2017)
  • Author(s): Michimura Yuta、Kuwahara Yuya、Ushiba Takafumi、Matsumoto Nobuyuki、Ando Masaki
  • Journal Title: Optics Express Volume: 25 Issue: 12 Pages: 13799-13799
  • DOI: 10.1364/oe.25.013799
  • NAID: 130007510803
  • Peer Reviewed / Open Access
• [Journal Article] Direct measurement of optical-trap-induced decoherence (2016)
  • Author(s): Nobuyuki Matsumoto, Kentaro Komori, Sosuke Ito, Yuta Michimura, and Yoichi Aso
  • Journal Title: Physics Review A Volume: 94 Issue: 3 Pages: 033822-033822
  • DOI: 10.1103/physreva.94.033822
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] 5-mg suspended mirror driven by measurement-induced back-action (2015)
  • Author(s): Nobuyuki Matsumoto, Kentaro Komori, Yuta Michimura, Gen Hayase, Yoichi Aso, Kimio Tsubono
  • Journal Title: Physical Review A Volume: 92 Issue: 3 Pages: 033825-033825
  • DOI: 10.1103/physreva.92.033825
  • Peer Reviewed
• [Presentation] 光学トラップによる懸架鏡の遠隔冷却および熱的デコヒーレンスの低減 (2016)
  • Author(s): 小森健太郎, 松本伸之, 道村唯太, 安東正樹
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 東北学院大
  • Year and Date: 2016-03-19
• [Presentation] Towards probing fundamental Physics using a massive mechanical oscillator (2015)
  • Author(s): Nobuyuki Matsumoto
  • Organizer: 6th RIEC-RLE Meeting on Research Collaboration in Photonics
  • Place of Presentation: 東北大学
  • Year and Date: 2015-10-26
  • Int'l Joint Research
• [Presentation] 光バネを用いた懸架鏡の遠隔冷却 (2015)
  • Author(s): 小森健太郎, 松本伸之, 道村唯太, 安東正樹
  • Organizer: 日本物理学会 2015年秋季大会
  • Place of Presentation: 大阪市大
  • Year and Date: 2015-09-25
• [Presentation] カーボンナノチューブ線を用いた低損失振り子の開発 (2015)
  • Author(s): 桑原祐也, 松本伸之, 牛場崇文, 井上翼, 苅田基志, 小森健太郎, 道村唯太, 安東正樹
  • Organizer: 日本物理学会 2015年秋季大会
  • Place of Presentation: 大阪市大
  • Year and Date: 2015-09-25
• [Book] Classical Pendulum Feels Quantum Back-Action (2016)
  • Author(s): Nobuyuki Matsumoto
  • Total Pages: 103
  • Publisher: Springer Japan