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Published April 2017 | Published + Submitted
Journal Article Open

Quantum correlation measurements in interferometric gravitational-wave detectors

Abstract

Quantum fluctuations in the phase and amplitude quadratures of light set limitations on the sensitivity of modern optical instruments. The sensitivity of the interferometric gravitational-wave detectors, such as the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO), is limited by quantum shot noise, quantum radiation pressure noise, and a set of classical noises. We show how the quantum properties of light can be used to distinguish these noises using correlation techniques. Particularly, in the first part of the paper we show estimations of the coating thermal noise and gas phase noise, hidden below the quantum shot noise in the Advanced LIGO sensitivity curve. We also make projections on the observatory sensitivity during the next science runs. In the second part of the paper we discuss the correlation technique that reveals the quantum radiation pressure noise from the background of classical noises and shot noise. We apply this technique to the Advanced LIGO data, collected during the first science run, and experimentally estimate the quantum correlations and quantum radiation pressure noise in the interferometer.

Additional Information

© 2017 American Physical Society. Received 14 February 2017; published 21 April 2017. The authors gratefully acknowledge the support of the United States National Science Foundation (NSF). D.V.M. would like to thank the Kavli Foundation for the support provided by a Kavli fellowship. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the NSF and operates under Cooperative Agreement No. PHY-0757058. The Advanced LIGO was built under Award No. PHY-0823459.

Attached Files

Submitted - 1702.03329.pdf

Published - PhysRevA.95.043831.pdf

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Created:
August 19, 2023
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