LIGO, Massachusetts Institute of Technology, Cambridge, MA, USA.
Haocun Yu, L. McCuller, M. Tse, L. Barsotti, N. Mavalvala, M. Evans, A. Fernández-Galiana, P. Fritschel, F. Matichard, C. Whittle, A. Buikema, S. Biscans, S Gras, BB Lane, M. MacInnis, GL Mansell, K. Mason, TJ Massinger, R. Mittleman, R. Weiss, Hang Yu and ME Zucker
OzGrav, Australian National University, Canberra, Australian Capital Territory, Australia
N. Kijbunchoo, DE McClelland, T. McRae, BJJ Slagmolen, NA Netherlands and RL Ward
LIGO Livingston Observatory, Livingston, LA, USA
J. Betzwieser, CD Blair, A. Effler, VV Frolov, A. Mullavey, C. Adams, SM Aston, A. Bramley, TM Evans, M. Fyffe, JA Giaime, KD Giardina, J. Hanson, RK Hasskew, MC Heintze, M. Laxen, M. Lormand, S. McCormick, TJN Nelson, Richard J. Oram, H. Overmier, W. Parker, A. Pele, JH Romie, E. Schwartz, D. Sellers, M. Thomas, KA Thorne and G. Traylor
LIGO Hanford Observatory, Richland, WA, USA
SE Dwyer, D. Sigg, D. Barker, J. Bartlett, RM Blair, F. Clara, JC Driggers, C. Gray, J. Hanks, JD Jones, K. Kawabe, PJ King, JS Kissel, Rahul Kumar, M Landry, YK Lecoeuche, GL Mansell, R. McCarthy, G. Mendell, EL Merilh, G. Moreno, J. Oberling, CJ Perez, M. Pirello, H. Radkins, CL Romel, K. Ryan, T. Sadecki, RL Savage, T. Shaffer, P. Thomas, C. Vorvick, J. Warner and B. Weaver
LIGO, California Institute of Technology, Pasadena, CA, USA
F. Matichard, R. Abbott, RX Adhikari, A. Ananyeva, S. Appert, K. Arai, G. Billingsley, S. Biscans, R. Bork, AF Brooks, C. Cahillane, DC Coyne, T. Etzel, J Feicht, Anchal Gupta, EK Gustafson, M. Kasprzack, J. McIver, C. Osthelder, JW Richardson, NA Robertson, JG Rollins, EJ Sanchez, LE Sanchez, D. Schaetzl, L. Sun, CI Torrie, G. Vajente. , G. Venugopalan, CC Wipf, L. Xiao, H. Yamamoto, L. Zhang, ME Zucker and J. Zweizig
Caltech CaRT, Pasadena, CA, USA
Y. Chen
Louisiana State University, Baton Rouge, LA, USA
TR Corbitt, C. Austin, JA Giaime, E. Goetz, T. Hardwick, S. Soni, AL Urban & G. Valdes
Universität Hamburg, Hamburg, Germany
R. Schnabel
California State University Fullerton, Fullerton, CA, USA.
JS Areeda and JR Smith
Columbia University, New York, NY, USA
Y. Asali, KR Corley, ST Countryman, S. Márka and Z. Márka
Christopher Newport University, Newport News, VA, USA
AM Baer
University of Oregon, Eugene, OR, USA
M. Ball, AF Helmling-Cornell, S. Karki, K. Merfeld, P. Nguyen, JR Palamos and RMS Schofield
Syracuse University, Syracuse, NY, USA
SW Ballmer, D. Davis, DC Vander-Hyde and T. Vo
University of Minnesota, Minneapolis, MN, USA
S. Banagiri
Stanford University, Stanford, California, USA
BK Berger and B. Lantz
Missouri University of Science and Technology, Rolla, MO, USA
D. Bhattacharjee and E. Goetz
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Hannover, Germany
N. Bode, P. Booker, J. Liu, F. Meylahn and B. Willke
Leibniz Universität Hannover, Hannover, Germany
N. Bode, P. Booker, J. Liu, F. Meylahn and B. Willke
OzGrav, University of Adelaide, Adelaide, South Australia, Australia
DD Brown, AA Ciobanu, DJ Ottaway and PJ Veitch
RESCEU, University of Tokyo, Tokyo, Japan
KC Cannon
OzGrav, University of Western Australia, Crawley, Western Australia, Australia
X. Chen
University of Birmingham, Birmingham, UK
SJ Cooper, C. Di Fronzo, DV Martynov and CM Mow-Lowry
Universitat de les Illes Balears, IAC3 – IEEC, Palma de Mallorca, Spain
PB Covas
SUPA, University of Glasgow, Glasgow, UK
LEH Datrier, P. Dupej, R. Gray, NA Robertson, B. Sorazu, AP Spencer, KA Strain and K. Toland
Cardiff University, Cardiff, UK
KL Dooley, R. Macas and DM Macleod
The University of Mississippi, University, MS, USA
KL Dooley
University of Florida, Gainesville, FL, USA
P. Fulda, AC Green and MJ Szczepańczyk
Pennsylvania State University, University Park, PA, USA
P. Godwin
University of Michigan, Ann Arbor, MI, USA
R. Gustafson, J. Leviton and K. Riles
Interuniversity Center for Astronomy and Astrophysics, Pune, India
S. Kandhasamy and TR Saravanan
Portsmouth University, Portsmouth, UK
AP Lundgren, S. Mozzon and LK Nuttall
The University of Sheffield, Sheffield, UK.
T. Mistry
Southern University and A&M College, Baton Rouge, LA, USA.
W. Parker
OzGrav, School of Physics and Astronomy, Monash University, Clayton, Victoria, Australia.
E. Payne
The University of Texas Rio Grande Valley, Brownsville, TX, USA.
KE Ramirez
University of Washington, Seattle, WA, USA
MP Ross and K. Venkateswara
Concordia University Wisconsin, Mequon, WI, USA
AD Viets
Kenyon College, Gambier, OH, USA
M. Wade
The measurements presented in this document were made with the 4 km detector at the LIGO Livingston Observatory using a new compressed light source. Haocun Yu made all the measurements. Haocun Yu and LM carried out the data analysis. M. Tse, Haocun Yu and NK built and commissioned the squeezed light sources. LB led the upgrade of light squeezed from LIGO detectors, with the participation of large numbers of people within the LIGO Laboratory, the National University of Australia and other members of the LIGO Scientific Collaboration. NM led the experimental campaign to measure sub-SQL quantum noise on the Advanced LIGO detector. Haocun Yu, LM, M. Tse, LB and NM directly contributed to the preparation of the manuscript.
