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Increasing the sensitivity of future gravitational-wave detectors with double squeezed-input

Khalili, Farid Ya. and Miao, Haixing and Chen, Yanbei (2009) Increasing the sensitivity of future gravitational-wave detectors with double squeezed-input. Physical Review D, 80 (4 ). Art. No. 042006. ISSN 2470-0010.

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We consider improving the sensitivity of future interferometric gravitational-wave detectors by simultaneously injecting two squeezed vacuums (light), filtered through a resonant Fabry-Perot cavity, into the dark port of the interferometer. The same scheme with single squeezed vacuum was first proposed and analyzed by Corbitt et al. [Phys. Rev. D 70, 022002 (2004).]. Here we show that the extra squeezed vacuum, together with an additional homodyne detection suggested previously by one of the authors [F. Ya. Khalili, Phys. Rev. D 77, 062003 (2008).], allows reduction of quantum noise over the entire detection band. To motivate future implementations, we take into account a realistic technical noise budget for Advanced LIGO and numerically optimize the parameters of both the filter and the interferometer for detecting gravitational-wave signals from two important astrophysics sources, namely, neutron-star–neutron-star binaries and bursts. Assuming the optical loss of the ~30 m filter cavity to be 10 ppm per bounce and 10 dB squeezing injection, the corresponding quantum noise with optimal parameters lowers by a factor of 10 at high frequencies and goes below the technical noise at low and intermediate frequencies.

Item Type:Article
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URLURL TypeDescription PublisherUNSPECIFIED
Chen, Yanbei0000-0002-9730-9463
Additional Information:© 2009 The American Physical Society. Received 8 May 2009; published 20 August 2009. We thank S. L. Danilishin for invaluable discussions. F.Y. K.’s research has been supported by the NSF and Caltech Grant No. PHY-0651036. H. M.’s research was supported by the Australian Research Council and the Department of Education, Science and Training. Y. C.’s research was supported by the Alexander von Humboldt Foundation’s Sofja Kovalevskaja Programme, NSF Grants No. PHY-0653653 and No. PHY-0601459, as well as the David and Barbara Groce startup fund at Caltech. H. M. would like to thank D. G. Blair, J. Li, and C. Zhao for their keen support of his visit to the Max Planck Institute and Caltech.
Funding AgencyGrant Number
Australian Research CouncilUNSPECIFIED
Department of Education, Science and TrainingUNSPECIFIED
Alexander von Humboldt Foundation’s Sofja Kovalevskaja ProgrammeUNSPECIFIED
David and Barbara GroceUNSPECIFIED
Issue or Number:4
Classification Code:04.80.Nn; 03.65.Ta; 42.50.Dv; 95.55.Ym
Record Number:CaltechAUTHORS:20091001-143504540
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Official Citation:Increasing the sensitivity of future gravitational-wave detectors with double squeezed-input Farid Ya. Khalili, Haixing Miao, and Yanbei Chen, Phys. Rev. D 80, 042006 (2009), DOI:10.1103/PhysRevD.80.042006
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16158
Deposited By: Ruth Sustaita
Deposited On:05 Oct 2009 17:46
Last Modified:09 Mar 2020 13:18

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