The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 46 Issue 1
- /
- Pages.37.2-37.2
- /
- 2021
- /
- 1226-2692(pISSN)
Status of squeezed vacuum experiment and introduction to EPR
한국천문연구원의 진공양자조임 광원 개발 및 EPR 실험 소개
- Kim, Chang-Hee (Korea Astronomy and Space Science Institute) ;
- Lee, Sungho (Korea Astronomy and Space Science Institute) ;
- Park, June Gyu (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)
- 김창희 (한국천문연구원) ;
- 이성호 (한국천문연구원) ;
- 박준규 (한국천문연구원) ;
- 김윤종 (한국천문연구원) ;
-
정의정
(한국천문연구원)
;
- 제순규 (한국천문연구원) ;
-
성현철
(한국천문연구원)
;
- 한정열 (한국천문연구원)
- Published : 2021.04.13
Abstract
One of the main limitations to the ground- based gravitational-wave (GW) detector sensitivity is quantum noise, which is induced by vacuum fluctuations entering the detector output port. The replacement of this ordinary vacuum field with a squeezed vacuum field has proven to be effective approach to mitigate the quantum noise in the interferometer detector and it is currently used in advanced detectors. However, the current frequency-independent squeezed vacuum cannot reduce quantum radiation pressure noise at low frequencies. A possible solution to reduce quantum noise in the broadband spectrum is the injection of frequency-dependent squeezed (FDS) vacuum. We will report the current status of squeezing experiment at KASI and introduce to the EPR (Einstein-Podolsky-Rosen) entangled state of light, which can realize FDS light without the need for an additional, external cavity.
Keywords