The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 46 Issue 1
- /
- Pages.37.3-38
- /
- 2021
- /
- 1226-2692(pISSN)
Frequency dependent squeezing for gravitational wave detectors using filter cavity and international collaboration of a filter cavity project for KAGRA
중력파 검출기의 양자 잡음 저감을 위한 필터 공동기 기반 주파수 의존 양자조임 기술과 KAGRA의 필터 공동기 제작을 위한 국제협력연구
- Park, June Gyu (Korea Astronomy and Space Science Institute) ;
- Lee, Sungho (Korea Astronomy and Space Science Institute) ;
- Kim, Chang-Hee (Korea Astronomy and Space Science Institute) ;
- Kim, Yunjong (Korea Astronomy and Space Science Institute) ;
-
Jeong, Ueejeong
(Korea Astronomy and Space Science Institute)
;
- Je, Soonkyu (Korea Astronomy and Space Science Institute) ;
-
Seong, Hyeon Cheol
(Korea Astronomy and Space Science Institute)
;
- Han, Jeong-Yeol (Korea Astronomy and Space Science Institute)
- 박준규 (한국천문연구원) ;
- 이성호 (한국천문연구원) ;
- 김창희 (한국천문연구원) ;
- 김윤종 (한국천문연구원) ;
-
정의정
(한국천문연구원)
;
- 제순규 (한국천문연구원) ;
-
성현철
(한국천문연구원)
;
- 한정열 (한국천문연구원)
- Published : 2021.04.13
Abstract
Radiation pressure noise of photon and photon shot noise are quantum noise limitation in interferometric gravita-tional wave detectors. Since relationship between the two noises is position and momentum of the Heisenberg uncertainty principle, quantum non-demolition (QND) technique is required to reduce the two noises at the same time. Frequency dependent squeezing using a filter cavity is one of realistic solutions for QND measurement and experimental results show that its cutting-edge performance is sufficient to apply to the current gravitational wave detectors. A 300m filter cavity is under construction at adv-LIGO. KAGRA (gravitational wave detector in Japan) has also started international collaboration to build a filter cavity. Recently we joined the filter cavity project for KAGRA. Current status of squeezing and filter cavity research at KASI and details of the KAGRA filter cavity project will be presented.
Keywords