@article{0cc7956607394be586d3f429b772aa6f,
title = "Squeezing the quantum noise of a gravitational-wave detector below the standard quantum limit",
abstract = "The Heisenberg uncertainty principle dictates that the position and momentum of an object cannot be simultaneously measured with arbitrary precision, giving rise to an apparent limitation known as the standard quantum limit (SQL). Gravitational-wave detectors use photons to continuously measure the positions of freely falling mirrors and so are affected by the SQL. We investigated the performance of the Laser Interferometer Gravitational-Wave Observatory (LIGO) after the experimental realization of frequency-dependent squeezing designed to surpass the SQL. For the LIGO Livingston detector, we found that the upgrade reduces quantum noise below the SQL by a maximum of three decibels between 35 and 75 hertz while achieving a broadband sensitivity improvement, increasing the overall detector sensitivity during astrophysical observations.",
author = "{members of the LIGO Scientific Collaboration†} and Wenxuan Jia and Victoria Xu and Kevin Kuns and Masayuki Nakano and Lisa Barsotti and Matthew Evans and Nergis Mavalvala and R. Abbott and I. Abouelfettouh and Adhikari, {R. X.} and A. Ananyeva and S. Appert and K. Arai and N. Aritomi and Aston, {S. M.} and M. Ball and Ballmer, {S. W.} and D. Barker and Berger, {B. K.} and J. Betzwieser and D. Bhattacharjee and G. Billingsley and N. Bode and E. Bonilla and V. Bossilkov and A. Branch and Brooks, {A. F.} and Brown, {D. D.} and J. Bryant and C. Cahillane and H. Cao and E. Capote and Y. Chen and F. Clara and J. Collins and Compton, {C. M.} and R. Cottingham and Coyne, {D. C.} and R. Crouch and J. Csizmazia and Cullen, {T. J.} and Dartez, {L. P.} and N. Demos and E. Dohmen and Driggers, {J. C.} and Dwyer, {S. E.} and A. Effler and A. Ejlli and T. Etzel and Y. Inoue",
year = "2024",
month = sep,
day = "20",
doi = "10.1126/science.ado8069",
language = "???core.languages.en_GB???",
volume = "385",
pages = "1318--1321",
journal = "Science",
issn = "0036-8075",
number = "6715",
}