Adaptive phase estimation is more accurate than nonadaptive phase estimation for continuous beams of light

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Title Adaptive phase estimation is more accurate than nonadaptive phase estimation for continuous beams of light
Author Pope, Damian Trevor; Wiseman, Howard Mark; Langford, N. K.
Journal Name Physical Review A
Year Published 2004
Place of publication USA
Publisher American Physical Society
Abstract We consider the task of estimating the randomly fluctuating phase of a continuous-wave beam of light. Using the theory of quantum parameter estimation, we show that this can be done more accurately when feedback is used (adaptive phase estimation) than by any scheme not involving feedback (nonadaptive phase estimation) in which the beam is measured as it arrives at the detector. Such schemes not involving feedback include all those based on heterodyne detection or instantaneous canonical phase measurements. We also demonstrate that the superior accuracy of adaptive phase estimation is present in a regime conducive to observing it experimentally.
Peer Reviewed Yes
Published Yes
Publisher URI http://pra.aps.org/
Alternative URI http://dx.doi.org/10.1103/PhysRevA.70.043812
Copyright Statement Copyright 2004 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.
Volume 70
Page from 043812.1
Page to 043812.13
ISSN 1050-2947
Date Accessioned 2005-03-07
Date Available 2009-10-12T23:15:34Z
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science
Subject PRE2009-Quantum Optics and Lasers
URI http://hdl.handle.net/10072/5723
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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