@article{72b121c9b7434664ba34bcd29bb78ba3,
title = "Increasing the Astrophysical Reach of the Advanced Virgo Detector via the Application of Squeezed Vacuum States of Light",
abstract = "Current interferometric gravitational-wave detectors are limited by quantum noise over a wide range of their measurement bandwidth. One method to overcome the quantum limit is the injection of squeezed vacuum states of light into the interferometer's dark port. Here, we report on the successful application of this quantum technology to improve the shot noise limited sensitivity of the Advanced Virgo gravitational-wave detector. A sensitivity enhancement of up to 3.2 +/- 0.1 dB beyond the shot noise limit is achieved. This nonclassical improvement corresponds to a 5%-8% increase of the binary neutron star horizon. The squeezing injection was fully automated and over the first 5 months of the third joint LIGO-Virgo observation run O3 squeezing was applied for more than 99% of the science time. During this period several gravitational-wave candidates have been recorded.",
keywords = "WAVE, NOISE",
author = "F. Acernese and M. Agathos and L. Aiello and A. Allocca and A. Amato and S. Ansoldi and S. Antier and M. Arene and N. Arnaud and S. Ascenzi and P. Astone and F. Aubin and S. Babak and P. Bacon and F. Badaracco and M.K.M. Bader and J. Baird and F. Baldaccini and G. Ballardin and G. Baltus and C. Barbieri and P. Barneo and F. Barone and M. Barsuglia and D. Barta and A. Basti and M. Bawaj and M. Bazzan and M. Bejger and I. Belahcene and S. Bernuzzi and D. Bersanetti and A. Bertolini and M. Bischi and M. Bitossi and M.A. Bizouard and F. Bobba and M. Boer and G. Bogaert and F. Bondu and R. Bonnand and B.A. Boom and V. Boschi and Y. Bouffanais and A. Bozzi and C. Bradaschia and M. Branchesi and M. Breschi and G. Koekoek and {van den Brand}, J.F.J. and {Virgo Collaboration}",
note = "Funding Information: The authors gratefully acknowledge the support of the Max Planck Society, Leibniz Universit{\"a}t Hannover, and Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through project Grant No. VA 1031/1-1 and under Germany{\textquoteright}s Excellence Strategy EXC 2123 QuantumFrontiers for the construction, installation, and operation of the squeezed light source. The authors gratefully acknowledge the Italian Istituto Nazionale di Fisica Nucleare (INFN), the French Centre National de la Recherche Scientifique (CNRS), and Netherlands Organization for Scientific Research, for the construction and operation of the Virgo detector and the creation and support of the EGO consortium. The authors also gratefully acknowledge research support from these agencies as well as by the Spanish Agencia Estatal de Investigaci{\'o}n, the Conselleria d{\textquoteright}Educaci{\'o}, Investigaci{\'o}, Cultura i Esport de la Generalitat Valenciana, the National Science Center of Poland, the Swiss National Science Foundation (SNSF), the European Commission, and the Hungarian Scientific Research Fund (OTKA). The authors gratefully acknowledge the support of the NSF, STFC, MPS, INFN, CNRS, and the State of Niedersachsen, Germany, for provision of computational resources. Publisher Copyright: {\textcopyright} 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",
year = "2019",
month = dec,
day = "5",
doi = "10.1103/PhysRevLett.123.231108",
language = "English",
volume = "123",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "23",
}