Adaptive phase measurements for narrowband squeezed beams

Berry, Domonic W. and Wiseman, Howard M. (2006) Adaptive phase measurements for narrowband squeezed beams. Physical Review A - Atomic, Molecular, and Optical Physics, 73 6: Article number 063824. doi:10.1103/PhysRevA.73.063824

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Author Berry, Domonic W.
Wiseman, Howard M.
Title Adaptive phase measurements for narrowband squeezed beams
Journal name Physical Review A - Atomic, Molecular, and Optical Physics   Check publisher's open access policy
ISSN 1050-2947
Publication date 2006
Sub-type Article (original research)
DOI 10.1103/PhysRevA.73.063824
Open Access Status File (Publisher version)
Volume 73
Issue 6
Start page Article number 063824
Total pages 13
Editor B. Crasemann
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2006
Language eng
Subject 240201 Theoretical Physics
780102 Physical sciences
Abstract We have previously [Phys. Rev. A 65, 043803 (2002)] analyzed adaptive measurements for estimating the continuously varying phase of a coherent beam, and a broadband squeezed beam. A real squeezed beam must have finite photon flux N and hence can be significantly squeezed only over a limited frequency range. In this paper we analyze adaptive phase measurements of this type for a realistic model of a squeezed beam. We show that, provided it is possible to suitably choose the parameters of the beam, a mean-square phase uncertainty scaling as (N/kappa)(-5/8) is possible, where kappa is the linewidth of the beam resulting from the fluctuating phase. This is an improvement over the (N/kappa)(-1/2) scaling found previously for coherent beams. In the experimentally realistic case where there is a limit on the maximum squeezing possible, the variance will be reduced below that for coherent beams, though the scaling is unchanged.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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Created: Wed, 15 Aug 2007, 08:20:00 EST