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. and Furusawa, Akira (2012) Quantum-enhanced optical-phase tracking. Science, 337 6101: 1514-1517. doi:10.1126/science.1225258

Author 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
Title Quantum-enhanced optical-phase tracking
Journal name Science   Check publisher's open access policy
ISSN 0036-8075
Publication date 2012-09-21
Sub-type Article (original research)
DOI 10.1126/science.1225258
Volume 337
Issue 6101
Start page 1514
End page 1517
Total pages 4
Place of publication Washington, DC, United States
Publisher American Association for the Advancement of Science
Collection year 2013
Language eng
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.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes "Report"

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2013 Collection
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Citation counts: TR Web of Science Citation Count  Cited 54 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 59 times in Scopus Article | Citations
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