https://doi.org/10.1140/epjd/e2019-100471-2
Regular Article
Quantum noise reduction techniques in KAGRA⋆
Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan
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Received:
26
September
2019
Received in final form:
23
November
2019
Published online:
22
January
2020
Abstract
KAGRA is the first large-scale gravitational-wave detector with cryogenic test masses. Its target sensitivity is limited mostly by quantum noise in the observation frequency band owing to the remarkable reduction of thermal noise at cryogenic temperatures. It is thus essential to reduce quantum noise, and KAGRA is designed to implement two quantum noise reduction techniques. KAGRA has already started considering an upgrade plan, in which a few more new quantum noise reduction techniques will be incorporated. In this article, we report the currently implemented quantum noise reduction techniques for KAGRA and those that will be implemented in the near future.
Contribution to the Topical Issue “Quantum Technologies for Gravitational Physics”, edited by Tanja Mehlstäubler, Yanbei Chen, Guglielmo M. Tino, Hsien-Chi Yeh.
© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2020
