A Caltech Library Service

Enhancing interferometer sensitivity without sacrificing bandwidth and stability: Beyond single-mode and resolved-sideband approximation

Li, Xiang and Smetana, Jiri and Singh Ubhi, Amit and Bentley, Joe and Chen, Yanbei and Ma, Yiqiu and Miao, Haixing and Martynov, Denis (2021) Enhancing interferometer sensitivity without sacrificing bandwidth and stability: Beyond single-mode and resolved-sideband approximation. Physical Review D, 103 (12). Art. No. 122001. ISSN 2470-0010. doi:10.1103/physrevd.103.122001.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


Quantum noise limits the sensitivity of precision measurement devices, such as laser interferometer gravitational-wave observatories and axion detectors. In the shot-noise-limited regime, these resonant detectors are subject to a trade-off between the peak sensitivity and bandwidth. One approach to circumvent this limitation in gravitational-wave detectors is to embed an anomalous-dispersion optomechanical filter to broaden the bandwidth. The original filter cavity design, however, makes the entire system unstable. Recently, we proposed the coherent feedback between the arm cavity and the optomechanical filter to eliminate the instability via PT symmetry [Li et al., arXiv:2012.00836]. The original analysis based upon the Hamiltonian formalism adopted the single-mode and resolved-sideband approximations. In this paper, we go beyond these approximations and consider realistic parameters. We show that the main conclusion concerning stability remains intact, with both Nyquist analysis and a detailed time-domain simulation.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Li, Xiang0000-0002-3780-7735
Bentley, Joe0000-0002-4736-7403
Chen, Yanbei0000-0002-9730-9463
Ma, Yiqiu0000-0001-7192-4874
Miao, Haixing0000-0003-2879-5821
Martynov, Denis0000-0003-0679-1344
Additional Information:© 2021 American Physical Society. (Received 7 April 2021; accepted 14 May 2021; published 10 June 2021) We would like to thank Chunnong Zhao for helpful comments on the manuscripts during LIGO P&P review. X. L. and Y. C.’s research is funded by the Simons Foundation (Grant No. 568762) and the National Science Foundation, through Grants No. PHY-2011961, No. PHY-2011968, and No. PHY-1836809. J. S., A. S. U., J. B., H. M., and D. M. acknowledge support from the Birmingham Institute for Gravitational Wave Astronomy and UK EPSRC New Horizons award (Grant No. EP/V048872/1). H. M. has also been supported by a UK STFC Ernest Rutherford Fellowship (Grant No. ST/M005844/11).
Group:Walter Burke Institute for Theoretical Physics, TAPIR, LIGO
Funding AgencyGrant Number
Simons Foundation568762
Birmingham Institute for Gravitational Wave AstronomyUNSPECIFIED
Engineering and Physical Sciences Research Council (EPSRC)EP/V048872/1
Science and Technology Facilities Council (STFC)ST/M005844/11
Issue or Number:12
Record Number:CaltechAUTHORS:20210610-153552342
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109475
Deposited By: George Porter
Deposited On:11 Jun 2021 14:36
Last Modified:16 Nov 2021 19:36

Repository Staff Only: item control page