Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/71549
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Type: Journal article
Title: A gravitational wave observatory operating beyond the quantum shot-noise limit
Author: Ganija, M.
Hosken, D.
Munch, J.
Ottaway, D.
Veitch, P.
Citation: Nature Physics, 2011; 7(12):962-965
Publisher: Nature Publishing Group
Issue Date: 2011
ISSN: 1745-2473
1745-2481
Statement of
Responsibility: 
J. Abadie... M.R. Ganija... D.J. Hosken... J. Munch... D.J. Ottaway... P.J. Veitch... et al. J. Abadie... M. R. Ganija...D. J. Hosken... J. Munch... D. J. Ottaway... P. J. Veitch... et al., (LIGO Scientific Collaboration)
Abstract: Around the globe several observatories are seeking the first direct detection of gravitational waves (GWs). These waves are predicted by Einstein’s general theory of relativity and are generated, for example, by black-hole binary systems. Present GW detectors are Michelson-type kilometre-scale laser interferometers measuring the distance changes between mirrors suspended in vacuum. The sensitivity of these detectors at frequencies above several hundred hertz is limited by the vacuum (zero-point) fluctuations of the electromagnetic field. A quantum technology—the injection of squeezed light—offers a solution to this problem. Here we demonstrate the squeezed-light enhancement of GEO600, which will be the GWobservatory operated by the LIGO Scientific Collaboration in its search for GWs for the next 3–4 years. GEO600 now operates with its best ever sensitivity, which proves the usefulness of quantum entanglement and the qualification of squeezed light as a key technology for future GW astronomy.
Rights: © 2011 Macmillan Publishers Limited. All rights reserved.
RMID: 0020118894
DOI: 10.1038/nphys2083
Appears in Collections:Chemistry and Physics publications
Environment Institute publications

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