Adaptive homodyne measurement of optical phase

Armen, Michael A., Au, John K., Stockton, John K., Doherty, Andrew C. and Mabuchi, Hideo (2002) Adaptive homodyne measurement of optical phase. Physical Review Letters, 89 13: 133602-1-133602-4. doi:10.1103/PhysRevLett.89.133602

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Author Armen, Michael A.
Au, John K.
Stockton, John K.
Doherty, Andrew C.
Mabuchi, Hideo
Title Adaptive homodyne measurement of optical phase
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2002-09-23
Year available 2002
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.89.133602
Open Access Status File (Publisher version)
Volume 89
Issue 13
Start page 133602-1
End page 133602-4
Total pages 4
Place of publication College Park, Maryland, U.S.A.
Publisher American Physical Society
Language eng
Subject C1
0206 Quantum Physics
0105 Mathematical Physics
Abstract We present an experimental demonstration of the power of feedback in quantum metrology, confirming the predicted [H. M. Wiseman, Phys. Rev. Lett. 75, 4587 (1995)] superior performance of an adaptive homodyne technique for single-shot measurement of optical phase. For measurements performed on weak coherent states with no prior knowledge of the signal phase, adaptive homodyne estimation approaches closer to the intrinsic quantum uncertainty than any previous technique. Our results underscore the importance of real-time feedback for reaching quantum limits in measurement and control.
Keyword Physics, Multidisciplinary
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 155 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 19 Sep 2007, 15:38:33 EST