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Exposing gravitational waves below the quantum sensing limit

Yu, Hang and Martynov, Denis and Adhikari, Rana X. and Chen, Yanbei (2022) Exposing gravitational waves below the quantum sensing limit. Physical Review D, 106 (6). Art. No. 063017. ISSN 2470-0010. doi:10.1103/physrevd.106.063017.

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The sensitivities of ground-based gravitational-wave (GW) detectors are limited by quantum shot noise at a few hundred hertz and above. Nonetheless, one can use a quantum-correlation technique proposed by Martynov et al. [Phys. Rev. A 95, 043831 (2017) to remove the expectation value of the shot noise, thereby exposing underlying classical signals in the cross spectrum formed by cross-correlating the two outputs in a GW interferometer’s antisymmetric port. We explore here the prospects and analyze the sensitivity of using quantum correlation to detect astrophysical GW signals. Conceptually, this technique is similar to the correlation of two different GW detectors as it utilizes the fact that a GW signal will be correlated in the two outputs but the shot noise will be uncorrelated. Quantum correlation also has its unique advantages as it requires only a single interferometer to make a detection. Therefore, quantum correlation could increase the duty cycle, enhance the search efficiency, and enable the detection of highly polarized signals. In particular, we show that quantum correlation could be especially useful for detecting postmerger remnants of binary neutron stars with both short (< 1 s) and intermediate (∼10 - 10⁴ s) durations and setting upper limits on continuous emissions from unknown pulsars.

Item Type:Article
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URLURL TypeDescription
Yu, Hang0000-0002-6011-6190
Martynov, Denis0000-0003-0679-1344
Adhikari, Rana X.0000-0002-5731-5076
Chen, Yanbei0000-0002-9730-9463
Additional Information:We thank the helpful comments and feedback from L. Sun, K. Riles, and other LVK colleagues. H. Y. is supported by the Sherman Fairchild Foundation. D. M. acknowledges the support of the Institute for Gravitational Wave Astronomy at the University of Birmingham, STFC (Grants No. ST/T006609/1, No. ST/S000305/1), and EPSRC research councils (Grants No. EP/V048872/1, No. EP/V008617/1). R. X. A is supported by NSF Grants No. PHY-1764464 and No. PHY-1912677. Y. C. is supported by the Simons Foundation (Grant Number 568762) and by NSF Grants No. PHY-2011961, No. PHY-2011968, and No. PHY–1836809.
Group:LIGO, Walter Burke Institute for Theoretical Physics, TAPIR
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
University of BirminghamUNSPECIFIED
Science and Technology Facilities Council (STFC)ST/T006609/1
Science and Technology Facilities Council (STFC)ST/S000305/1
Engineering and Physical Sciences Research Council (EPSRC)EP/V048872/1
Engineering and Physical Sciences Research Council (EPSRC)EP/V008617/1
Simons Foundation568762
Issue or Number:6
Record Number:CaltechAUTHORS:20221121-712406200.10
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117945
Deposited By: Research Services Depository
Deposited On:01 Dec 2022 18:18
Last Modified:01 Dec 2022 18:18

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