Entanglement and squeezing of continuous-wave stationary light

Spectral components of continuous squeezed fields are entangled. In this article we review and clarify this phenomenon by analyzing systematically the relations between the correlations of modes filtered from stationary continuous fields and the cross-power spectrum between the operators of the corr...

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Published in:New journal of physics 2015-04, Vol.17 (4), p.43025
Main Authors: Zippilli, Stefano, Giuseppe, Giovanni Di, Vitali, David
Format: Article
Language:English
Subjects:
Compressing
continuous fields
Continuous radiation
continuous variables
Entanglement
optomechanics
Physics
Spectra
squeezing
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description Spectral components of continuous squeezed fields are entangled. In this article we review and clarify this phenomenon by analyzing systematically the relations between the correlations of modes filtered from stationary continuous fields and the cross-power spectrum between the operators of the corresponding spectral components. Moreover, we study the specific spectral components that are filtered in homodyne or heterodyne detections and their entanglement properties. In particular, we establish the equivalence between two-mode squeezing variance and logarithmic negativity for the spectral components of continuous stationary fields, thereby demonstrating that the measurement of the homodyne or heterodyne spectrum is, in fact, a direct measurement of the logarithmic negativity between specific spectral modes. As an illustrative example, we apply these concepts to the analysis of entanglement in ponderomotive squeezing.
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subjects Compressing
continuous fields
Continuous radiation
continuous variables
Entanglement
optomechanics
Physics
Spectra
squeezing
title Entanglement and squeezing of continuous-wave stationary light
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