Cooling of a massive pendulum to its ground state for test of generalized uncertainty principle
| Project/Area Number |
15H05444
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥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)
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| 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 |
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| 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.
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Report
(4 results)
Research Products
(8 results)
