Broadband quantum noise reduction via EPR squeezing
| Project/Area Number |
18H01235
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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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| Review Section |
Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
Leonardi Matteo 国立天文台, 重力波プロジェクト, 助教 (90816448)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
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| Keywords | freq. dep. squeezing / filter cavity / quantum optics / gravitational wave / KAGRA / frequency dep. squeezing / Quantum Optics / Gravitational Wave |
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| Outline of Final Research Achievements |
The first detection of gravitational waves in 2015 opened the era of gravitational wave astronomy. With this new field of research, we can explore the universe in previously unknown ways and better comprehend the behavior gravity. To increase the number of detections of gravitational waves, the sensitivity of gravitational wave detectors needs to be improved. The most fundamental noise which limits the sensitivity of gravitational wave detector is the quantum noise of light. To suppress this noise, the quantum properties of light need to be manipulated in order to create what is called a squeezed vacuum state.
For the first time in the world, we achieved the production of a frequency dependent squeezed vacuum state with frequency rotation suitable for application in gravitational wave detectors. This result was published on Physical Review Letter (highlighted in Physics and Editor Suggestion) and several press releases were organized to follow-up this result.
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| Academic Significance and Societal Importance of the Research Achievements |
重力波天文学という新しい研究分野では今後、人類の宇宙に対する理解を深める多くの発見が期待されている。この研究分野を発展させるためには、重力波検出器を改良する必要がある。本研究では、「スクイーズド真空場」と呼ばれる量子状態を低周波で操作することに初めて成功した。この技術は、より多くの重力波イベントの検出につながるだけでなく、光の量子性に関する我々の理解を深めることにもなる。
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Report
(4 results)
Research Products
(30 results)
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[Journal Article] Measurement of optical losses in a high-finesse 300 m filter cavity for broadband quantum noise reduction in gravitational-wave detectors2018
Author(s)
E. Capocasa, Y. Guo, M. Eisenmann, Y. Zhao, A. Tomura, K. Arai, Y. Aso, M. Marchio, L. Pinard, P. Prat, K. Somiya, R. Schnabel, M. Tacca, R. Takahashi, D. Tatsumi, M. Leonardi, M. Barsuglia, and R. Flaminio
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Journal Title
Phys. Rev. D
Volume: 98
Issue: 2
Pages: 022010-022010
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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