Enhancing the sensitivity of the LIGO gravitational wave detector by using squeezed states of light - INSPIRE

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Enhancing the sensitivity of the LIGO gravitational wave detector by using squeezed states of light

LIGO Scientific

Collaboration

Jul 21, 2013

7 pages

Published in:

Nature Photon. 7 (2013) 613-619

Published: Jul 21, 2013

e-Print:

1310.0383 [quant-ph]

DOI:

10.1038/nphoton.2013.177

Experiments:

LIGO

View in:

ADS Abstract Service

reference search771 citations

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Abstract: (arXiv)

Nearly a century after Einstein first predicted the existence of gravitational waves, a global network of earth-based gravitational wave observatories is seeking to directly detect this faint radiation using precision laser interferometry. Photon shot noise, due to the quantum nature of light, imposes a fundamental limit on the attometer level sensitivity of the kilometer-scale Michelson interferometers deployed for this task. Here we inject squeezed states to improve the performance of one of the detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO) beyond the quantum noise limit, most notably in the frequency region down to 150 Hz, critically important for several astrophysical sources, with no deterioration of performance observed at any frequency. With the injection of squeezed states, this LIGO detector demonstrated the best broadband sensitivity to gravitational waves ever achieved, with important implications for observing the gravitational wave Uni- verse with unprecedented sensitivity.

LIGO: sensitivity
gravitational radiation detector
squeezed state

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Figures(3)

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