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Direct approach to realizing quantum filters for high-precision measurements

Bentley, Joe and Nurdin, Hendra and Chen, Yanbei and Miao, Haixing (2021) Direct approach to realizing quantum filters for high-precision measurements. Physical Review A, 103 (1). Art. No. 013707. ISSN 2469-9926. doi:10.1103/physreva.103.013707.

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Quantum noise sets a fundamental limit to the sensitivity of high-precision measurements. Suppressing it can be achieved by using nonclassical states and quantum filters, which modify both the noise and signal response. We find an approach to realizing quantum filters directly from their frequency-domain transfer functions, utilizing techniques developed by the quantum control community. It not only allows us to construct quantum filters that defy intuition, but also opens a path towards the systematic design of optimal quantum measurement devices. As an illustration, we show an optical realization of an active unstable filter with anomalous dispersion, proposed for improving the quantum-limited sensitivity of gravitational-wave detectors.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Bentley, Joe0000-0002-4736-7403
Nurdin, Hendra0000-0002-5588-4259
Chen, Yanbei0000-0002-9730-9463
Miao, Haixing0000-0003-2879-5821
Alternate Title:A direct approach to realising quantum filters for high-precision measurements, A systematic approach to realising quantum filters for high-precision measurements using network synthesis theory
Additional Information:© 2021 American Physical Society. (Received 20 February 2020; revised 20 November 2020; accepted 14 December 2020; published 7 January 2021) We would like to thank R. Adhikari, D. Martynov, N. Yamamoto, LIGO AIC, and QNWG for fruitful discussions. J.B. is supported by STFC and School of Physics and Astronomy at the University of Birmingham. J.B. and H.M. acknowledge the additional support from the Birmingham Institute for Gravitational Wave Astronomy. H.M. has also been supported by UK STFC Ernest Rutherford Fellowship (Grant No. ST/M005844/11). Y.C. is supported by the Simons Foundation (Award Number 568762) and the National Science Foundation, through Grants PHY-1708212 and PHY-1708213.
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)ST/M005844/11
University of BirminghamUNSPECIFIED
Simons Foundation568762
Issue or Number:1
Record Number:CaltechAUTHORS:20210111-164758381
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107411
Deposited By: George Porter
Deposited On:12 Jan 2021 15:01
Last Modified:16 Nov 2021 19:02

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