Innovative Quantum Noise reduction strategies for GW detectors

GW 探测器的创新量子降噪策略

• 批准号: 21H04476
• 负责人: LEONARDI MATTEO
• 金额: $ 23.71万
• 依托单位: National Astronomical Observatory of Japan
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-05 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21H04476/
• 关键词: quantum noise; gravitational wave; KAGRA; filter cavity; freq. dep. squeezing

In FY2022 several steps were taken in order to improve the stability of the filter cavity. The use of a bichromatic control for the filter cavity length, alignment and incident beam pointing degree of freedoms was finalized after being studied since FY2021. This was a crucial step in understanding the relationship between infrared lock and green lock. A paper on Physical Review D was published on it. With this control, a factor of 6 improvement on the filter cavity detuning was achieved, bringing this parameter within the requirement for implementation in KAGRA. In addition, the scheme proposed in the paper was officially adopted also by the Italian-French gravitational wave detector named Virgo. Another step done to improve the stability of the filter cavity was also achieved which was the experimental demonstration of the lock of the filter cavity via the coherent control sidebands scheme proposed theoretically by our group in 2019. The results of this demonstration have also been published in Physical Review D.In addition, several steps have been performed to reduce the impact of optical losses. In particular, the new low losses Faraday isolator has been characterized and the new low loss Optical Parametric Oscillator has been realized and characterized. The new low losses component will allow for a better characterization of scattering losses which will in turn lead to better understanding the role of polishing specs in the filter cavity system.

在2022财年，我们采取了几个步骤来提高滤波器腔体的稳定性。自2021财政年度起，经研究后，最终确定使用双色控制滤波腔长度、对准及入射光束指向自由度。这是理解红外锁定和绿色锁定之间关系的关键一步。在Physical Review D上发表了一篇关于它的论文。通过这种控制，实现了滤波器腔失谐的6倍改善，使该参数符合KAGRA的实施要求。此外，论文中提出的方案也被意大利-法国引力波探测器Virgo正式采用。为提高滤波腔的稳定性，我们还完成了另一个步骤，即通过我们小组在2019年理论上提出的相干控制边带方案实现滤波腔锁定的实验演示。该演示的结果也已发表在《物理评论D》上。此外，还执行了几个步骤来减少光学损耗的影响。特别是，新的低损耗法拉第隔离器的特点和新的低损耗光学参量振荡器已实现和特点。新的低损耗组件将允许更好地表征散射损耗，这反过来又会导致更好地理解滤波器腔系统中抛光规范的作用。

项目成果

Status of squeezing and quantum enhancement for gravitational wave detection at NAOJ

NAOJ引力波探测的压缩和量子增强现状

• 发表时间: 2022
• 作者: 福村省三;Patrick Strasser;猪野隆;奥隆之;奥平琢也;神田聡太郎;北口雅暁;清水裕彦;下村浩一郎;西村昇一郎;唐橋一浩;身内賢太朗;M. Page
• 通讯作者: M. Page

Demonstration of length control for a filter cavity with coherent control sidebands

• DOI: 10.1103/physrevd.106.102003
• 发表时间: 2022-11
• 期刊: Physical Review D
• 影响因子: 5
• 作者: N. Aritomi;Yuhang Zhao;E. Capocasa;M. Leonardi;M. Eisenmann;Michael Page;Yuefan Guo;E. Polini;Akihiro Tomura;K. Arai;Y. Aso;M. van Beuzekom;Yao-Chin Huang;Ray-Kuang Lee;H. Lück;O. Miyakawa;P. Prat;A. Shoda;M. Tacca;R. Takahashi;H. Vahlbruch;M. Vardaro;Chien‐Ming Wu;M. Barsuglia;R. Flaminio

KAGRA filter cavity project and frequency dependent squeezing experiment at TAMA

TAMA 的 KAGRA 滤腔项目和频率相关挤压实验

• 发表时间: 2022
• 作者: 福村省三;Patrick Strasser;猪野隆;奥隆之;奥平琢也;神田聡太郎;北口雅暁;清水裕彦;下村浩一郎;西村昇一郎;Y. Zhao
• 通讯作者: Y. Zhao

Stats of KAGRA Filter Cavity

KAGRA 过滤腔统计数据

• 发表时间: 2022
• 作者: Hiromasa Tanaka;Shogo Maeda;Masaaki Mizuno;Kenji Ishikawa;Kae Nakamura;Hiroaki Kajiyama;Yasumasa Okazaki;Shinaya Toyokuni;M. Ito;K. Ohno;Fumitaka Kikkawa;and Masaru Hori;Y. Aso
• 通讯作者: Y. Aso

Demonstration of filter cavity lock with CC sidebands

带 CC 边带的滤波器腔锁演示

• 发表时间: 2021
• 作者: 金崎奎;N. Aritomi
• 通讯作者: N. Aritomi