Complementarity in a quantum nondemolition measurement

Sanders, B. C. and Milburn, G. J. (1989) Complementarity in a quantum nondemolition measurement. Physical Review a, 39 2: 694-702. doi:10.1103/PhysRevA.39.694

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Author Sanders, B. C.
Milburn, G. J.
Title Complementarity in a quantum nondemolition measurement
Journal name Physical Review a   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 1989-01-01
Sub-type Article (original research)
DOI 10.1103/PhysRevA.39.694
Open Access Status File (Publisher version)
Volume 39
Issue 2
Start page 694
End page 702
Total pages 9
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract We present an analysis of a quantum nondemolition (QND) measurement, which determines which of the two possible paths a photon follows through a Mach-Zehnder interferometer. The measurement is effected by the nonlinear Kerr effect. If a photon traverses the arm of the interferometer containing the Kerr medium, it shifts the phase of a probe beam and then continues through to the interferometer output. The measurement does not destroy the photon but does disturb its phase. Using various probe states, we show how such phase disturbances reduce fringe visibility and enforce a principle of complementarity; the more accurately the QND measurement determines the path of the photon, the lower is the fringe visibility. We determine the appropriate parameters to optimize the observation of the two complementary quantities.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
School of Engineering Publications
 
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