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

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dc.contributor.author Sengupta, Anand
dc.date.accessioned 2014-03-17T13:15:31Z
dc.date.available 2014-03-17T13:15:31Z
dc.date.issued 2013-06
dc.identifier.citation Sengupta, Anand et al., “Enhanced sensitivity of the LIGO gravitational wave detector by using squeezed states of light”, Nature Photonics, DOI: 10.1038/NPHOTON.2013.177, vol. 7, pp. 613-619, Jun. 2013. en_US
dc.identifier.issn 1749-4885
dc.identifier.uri http://dx.doi.org/10.1038/nphoton.2013.177
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/883
dc.description.abstract Nearly a century after Einstein first predicted the existence of gravitational waves, a global network of Earth-based gravitational wave observatories1, 2, 3, 4 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 attometre-level sensitivity of the kilometre-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 Universe with unprecedented sensitivity. en_US
dc.description.statementofresponsibility by Anand Sengupta et al.,
dc.format.extent vol. 7, no. 8, pp. 613-619
dc.language.iso en en_US
dc.publisher Nature Publishing Group en_US
dc.subject Enhanced sensitivity en_US
dc.subject Frequency regions en_US
dc.subject Global networks en_US
dc.subject Gravitational wave detectors en_US
dc.subject Gravitational-wave observatory en_US
dc.subject Observatories en_US
dc.subject Quantum noise limit en_US
dc.title Enhanced sensitivity of the LIGO gravitational wave detector by using squeezed states of light en_US
dc.type Article en_US
dc.relation.journal Nature Photonics


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