Heterodyne and adaptive phase measurements on states of fixed mean photon number

Berry, D., Wiseman, H. M. and Zhang, Zhong-Xi (1999) Heterodyne and adaptive phase measurements on states of fixed mean photon number. Physical Review A, 60 3: 2458-2466. doi:10.1103/PhysRevA.60.2458

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Author Berry, D.
Wiseman, H. M.
Zhang, Zhong-Xi
Title Heterodyne and adaptive phase measurements on states of fixed mean photon number
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 1999-01-01
Sub-type Article (original research)
DOI 10.1103/PhysRevA.60.2458
Open Access Status File (Publisher version)
Volume 60
Issue 3
Start page 2458
End page 2466
Total pages 9
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract The standard technique for measuring the phase of a single-mode field is heterodyne detection. Such a measurement may have an uncertainty far above the intrinsic quantum phase uncertainty of the state. Recently it has been shown [H. M. Wiseman and R. B. Killip, Phys. Rev. A 57, 2169 (1998)] that an adaptive technique introduces far less excess noise. Here we quantify this difference by an exact numerical calculation of the minimum measured phase variance for the various schemes, optimized over states with a fixed mean photon number. We also analytically derive the asymptotics for these variances. For the case of heterodyne detection our results disagree with the power law claimed by D'Ariano and Paris [Phys. Rev. A 49, 3022 (1994)]. [S1050-2947(99)04009-3].
Keyword Optics
Physics, Atomic, Molecular & Chemical
Q-Index Code C1
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Wed, 11 Jun 2008, 01:32:52 EST