Quantum theory of field-quadrature measurements

Wiseman, H. M. and Milburn, G. J. (1993) Quantum theory of field-quadrature measurements. Physical Review A, 47 1: 642-662. doi:10.1103/PhysRevA.47.642

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Author Wiseman, H. M.
Milburn, G. J.
Title Quantum theory of field-quadrature measurements
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 1993-01-01
Year available 1993
Sub-type Article (original research)
DOI 10.1103/PhysRevA.47.642
Open Access Status File (Publisher version)
Volume 47
Issue 1
Start page 642
End page 662
Total pages 21
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract The quantum effects on a cavity mode of the electromagnetic field caused by measuring one of its quadrature components is analyzed. We consider three measurement schemes: an intracavity quantum-nondemolition coupling to another mode, simple homodyne detection, and balanced homodyne detection. It is shown that, for suitable initial conditions, the first scheme has an effect which approaches that of a projective collapse of the state vector for long measurement times. However, the two homodyne schemes (which are shown to be equivalent for large local-oscillator amplitudes) do not approximate a projective measurement in any limit. In particular, it is shown that homodyne measurement cannot produce a squeezed state from a classical initial state. All three schemes are analyzed in terms of ‘‘quantum trajectories’’ which link measurement theory with stochastic quantum-jump processes.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 319 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 323 times in Scopus Article | Citations
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