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  • Phase measurements at the theoretical limit

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    Wiseman65700-Accepted.pdf (207.7Kb)
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    Accepted Manuscript (AM)
    Author(s)
    Berry, DW
    Wiseman, HM
    Griffith University Author(s)
    Wiseman, Howard M.
    Year published
    2001
    Metadata
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    Abstract
    It is well known that the result of any phase measurement on an optical mode made using linear optics has an introduced uncertainty in addition to the intrinsic quantum phase uncertainty of the state of the mode. The best previously published technique [H. M. Wiseman and R. B. Killip, Phys. Rev. A 57, 2169 (1998)] is an adaptive technique that introduces a phase variance that scales as n¯−1.5 , where ¯n is the mean photon number of the state. This is far above the minimum intrinsic quantum phase variance of the state, which scales as ¯n − 2 . It has been shown that a lower limit to the phase variance that is introduced scales ...
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    It is well known that the result of any phase measurement on an optical mode made using linear optics has an introduced uncertainty in addition to the intrinsic quantum phase uncertainty of the state of the mode. The best previously published technique [H. M. Wiseman and R. B. Killip, Phys. Rev. A 57, 2169 (1998)] is an adaptive technique that introduces a phase variance that scales as n¯−1.5 , where ¯n is the mean photon number of the state. This is far above the minimum intrinsic quantum phase variance of the state, which scales as ¯n − 2 . It has been shown that a lower limit to the phase variance that is introduced scales as ln(¯n ) / n¯ 2 . Here we introduce an adaptive technique that attains this theoretical lower limit.
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    Journal Title
    Physical Review A
    Volume
    63
    Issue
    1
    DOI
    https://doi.org/10.1103/PhysRevA.63.013813
    Copyright Statement
    © 2001 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Mathematical Sciences
    Physical Sciences
    Chemical Sciences
    Publication URI
    http://hdl.handle.net/10072/3787
    Collection
    • Journal articles

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