Quantum-Enhanced Optical-Phase Tracking

Hidehiro Yonezawa, Daisuke Nakane, Trevor A. Wheatley, Kohjiro Iwasawa, Shuntaro Takeda, Hajime Arao, Kentaro Ohki, Koji Tsumura, Dominic W. Berry, Timothy C. Ralph, Howard M. Wiseman, Elanor H. Huntington, Akira Furusawa

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Tracking a randomly varying optical phase is a key task in metrology, with applications in optical communication. The best precision for optical-phase tracking has until now been limited by the quantum vacuum fluctuations of coherent light. Here, we surpass this coherent-state limit by using a continuous-wave beam in a phase-squeezed quantum state. Unlike in previous squeezing-enhanced metrology, restricted to phases with very small variation, the best tracking precision (for a fixed light intensity) is achieved for a finite degree of squeezing because of Heisenberg's uncertainty principle. By optimizing the squeezing, we track the phase with a mean square error 15 ± 4% below the coherent-state limit.

LanguageEnglish
Pages1514-1517
Number of pages4
JournalScience
Volume337
Issue number6101
DOIs
Publication statusPublished - 21 Sep 2012

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Light
Vacuum
Uncertainty

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Yonezawa, H., Nakane, D., Wheatley, T. A., Iwasawa, K., Takeda, S., Arao, H., ... Furusawa, A. (2012). Quantum-Enhanced Optical-Phase Tracking. Science, 337(6101), 1514-1517. https://doi.org/10.1126/science.1225258
Yonezawa, Hidehiro ; Nakane, Daisuke ; Wheatley, Trevor A. ; Iwasawa, Kohjiro ; Takeda, Shuntaro ; Arao, Hajime ; Ohki, Kentaro ; Tsumura, Koji ; Berry, Dominic W. ; Ralph, Timothy C. ; Wiseman, Howard M. ; Huntington, Elanor H. ; Furusawa, Akira. / Quantum-Enhanced Optical-Phase Tracking. In: Science. 2012 ; Vol. 337, No. 6101. pp. 1514-1517.
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abstract = "Tracking a randomly varying optical phase is a key task in metrology, with applications in optical communication. The best precision for optical-phase tracking has until now been limited by the quantum vacuum fluctuations of coherent light. Here, we surpass this coherent-state limit by using a continuous-wave beam in a phase-squeezed quantum state. Unlike in previous squeezing-enhanced metrology, restricted to phases with very small variation, the best tracking precision (for a fixed light intensity) is achieved for a finite degree of squeezing because of Heisenberg's uncertainty principle. By optimizing the squeezing, we track the phase with a mean square error 15 ± 4{\%} below the coherent-state limit.",
author = "Hidehiro Yonezawa and Daisuke Nakane and Wheatley, {Trevor A.} and Kohjiro Iwasawa and Shuntaro Takeda and Hajime Arao and Kentaro Ohki and Koji Tsumura and Berry, {Dominic W.} and Ralph, {Timothy C.} and Wiseman, {Howard M.} and Huntington, {Elanor H.} and Akira Furusawa",
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Yonezawa, H, Nakane, D, Wheatley, TA, Iwasawa, K, Takeda, S, Arao, H, Ohki, K, Tsumura, K, Berry, DW, Ralph, TC, Wiseman, HM, Huntington, EH & Furusawa, A 2012, 'Quantum-Enhanced Optical-Phase Tracking', Science, vol. 337, no. 6101, pp. 1514-1517. https://doi.org/10.1126/science.1225258

Quantum-Enhanced Optical-Phase Tracking. / Yonezawa, Hidehiro; Nakane, Daisuke; Wheatley, Trevor A.; Iwasawa, Kohjiro; Takeda, Shuntaro; Arao, Hajime; Ohki, Kentaro; Tsumura, Koji; Berry, Dominic W.; Ralph, Timothy C.; Wiseman, Howard M.; Huntington, Elanor H.; Furusawa, Akira.

In: Science, Vol. 337, No. 6101, 21.09.2012, p. 1514-1517.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Wheatley, Trevor A.

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AU - Arao, Hajime

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AU - Tsumura, Koji

AU - Berry, Dominic W.

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Yonezawa H, Nakane D, Wheatley TA, Iwasawa K, Takeda S, Arao H et al. Quantum-Enhanced Optical-Phase Tracking. Science. 2012 Sep 21;337(6101):1514-1517. https://doi.org/10.1126/science.1225258