Adaptive optical phase estimation using time-symmetric quantum smoothing

T. A. Wheatley, D. W. Berry, H. Yonezawa, D. Nakane, H. Arao, D. T. Pope, T. C. Ralph, H. M. Wiseman, A. Furusawa, E. H. Huntington

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionResearchpeer-review

Abstract

We present an experimental demonstration of quantum smoothing, a non causal version of quantum parameter estimation that has applications from gravitational wave detection to quantum key distribution. An existing technique for this type of parameter estimation is quantum filtering, which uses past observations only. The technique presented here is time-symmetric that uses past and future observations to obtain a more precise estimate. We couple this innovative estimation technique with an adaptive detection scheme to demonstrate an estimation of the optical phase of light measured to be 2.24 ± 0.14 times better than the standard quantum limit. This approaches our theoretically derived prediction of a mean square error improvement of 2√2 times over the standard quantum limit [1].

LanguageEnglish
Title of host publicationQCMC 2010 : Quantum Communication, Measurement and Computing
Subtitle of host publicationthe Tenth International Conference
EditorsTimothy Ralph, Ping Koy Lam
Place of PublicationCollege Park, MD
PublisherAmerican Institute of Physics
Pages129-132
Number of pages4
ISBN (Print)9780735409217
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event10th International Conference on Quantum Communication, Measurement And Computing, QCMC 2010 - Brisbane, QLD, Australia
Duration: 19 Jul 201023 Jul 2010

Publication series

NameAIP conference proceedings
No.1
Volume1363

Other

Other10th International Conference on Quantum Communication, Measurement And Computing, QCMC 2010
CountryAustralia
CityBrisbane, QLD
Period19/07/1023/07/10

Fingerprint

smoothing
gravitational waves
estimates
predictions

Keywords

  • adaptive
  • parameter estimation
  • quantum optics
  • smoothing

Cite this

Wheatley, T. A., Berry, D. W., Yonezawa, H., Nakane, D., Arao, H., Pope, D. T., ... Huntington, E. H. (2011). Adaptive optical phase estimation using time-symmetric quantum smoothing. In T. Ralph, & P. K. Lam (Eds.), QCMC 2010 : Quantum Communication, Measurement and Computing : the Tenth International Conference (pp. 129-132). (AIP conference proceedings; Vol. 1363, No. 1). College Park, MD: American Institute of Physics. https://doi.org/10.1063/1.3630163
Wheatley, T. A. ; Berry, D. W. ; Yonezawa, H. ; Nakane, D. ; Arao, H. ; Pope, D. T. ; Ralph, T. C. ; Wiseman, H. M. ; Furusawa, A. ; Huntington, E. H. / Adaptive optical phase estimation using time-symmetric quantum smoothing. QCMC 2010 : Quantum Communication, Measurement and Computing : the Tenth International Conference. editor / Timothy Ralph ; Ping Koy Lam. College Park, MD : American Institute of Physics, 2011. pp. 129-132 (AIP conference proceedings; 1).
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title = "Adaptive optical phase estimation using time-symmetric quantum smoothing",
abstract = "We present an experimental demonstration of quantum smoothing, a non causal version of quantum parameter estimation that has applications from gravitational wave detection to quantum key distribution. An existing technique for this type of parameter estimation is quantum filtering, which uses past observations only. The technique presented here is time-symmetric that uses past and future observations to obtain a more precise estimate. We couple this innovative estimation technique with an adaptive detection scheme to demonstrate an estimation of the optical phase of light measured to be 2.24 ± 0.14 times better than the standard quantum limit. This approaches our theoretically derived prediction of a mean square error improvement of 2√2 times over the standard quantum limit [1].",
keywords = "adaptive, parameter estimation, quantum optics, smoothing",
author = "Wheatley, {T. A.} and Berry, {D. W.} and H. Yonezawa and D. Nakane and H. Arao and Pope, {D. T.} and Ralph, {T. C.} and Wiseman, {H. M.} and A. Furusawa and Huntington, {E. H.}",
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series = "AIP conference proceedings",
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Wheatley, TA, Berry, DW, Yonezawa, H, Nakane, D, Arao, H, Pope, DT, Ralph, TC, Wiseman, HM, Furusawa, A & Huntington, EH 2011, Adaptive optical phase estimation using time-symmetric quantum smoothing. in T Ralph & PK Lam (eds), QCMC 2010 : Quantum Communication, Measurement and Computing : the Tenth International Conference. AIP conference proceedings, no. 1, vol. 1363, American Institute of Physics, College Park, MD, pp. 129-132, 10th International Conference on Quantum Communication, Measurement And Computing, QCMC 2010, Brisbane, QLD, Australia, 19/07/10. https://doi.org/10.1063/1.3630163

Adaptive optical phase estimation using time-symmetric quantum smoothing. / Wheatley, T. A.; Berry, D. W.; Yonezawa, H.; Nakane, D.; Arao, H.; Pope, D. T.; Ralph, T. C.; Wiseman, H. M.; Furusawa, A.; Huntington, E. H.

QCMC 2010 : Quantum Communication, Measurement and Computing : the Tenth International Conference. ed. / Timothy Ralph; Ping Koy Lam. College Park, MD : American Institute of Physics, 2011. p. 129-132 (AIP conference proceedings; Vol. 1363, No. 1).

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionResearchpeer-review

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AB - We present an experimental demonstration of quantum smoothing, a non causal version of quantum parameter estimation that has applications from gravitational wave detection to quantum key distribution. An existing technique for this type of parameter estimation is quantum filtering, which uses past observations only. The technique presented here is time-symmetric that uses past and future observations to obtain a more precise estimate. We couple this innovative estimation technique with an adaptive detection scheme to demonstrate an estimation of the optical phase of light measured to be 2.24 ± 0.14 times better than the standard quantum limit. This approaches our theoretically derived prediction of a mean square error improvement of 2√2 times over the standard quantum limit [1].

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Wheatley TA, Berry DW, Yonezawa H, Nakane D, Arao H, Pope DT et al. Adaptive optical phase estimation using time-symmetric quantum smoothing. In Ralph T, Lam PK, editors, QCMC 2010 : Quantum Communication, Measurement and Computing : the Tenth International Conference. College Park, MD: American Institute of Physics. 2011. p. 129-132. (AIP conference proceedings; 1). https://doi.org/10.1063/1.3630163