Squeezing in resonance fluorescence via vacuum induced coherences

Abstract

The squeezing spectrum of the fluorescence field emitted from a four-level atom in $J=1/2$ to $J=1/2$ configuration driven by two coherent fields is studied. We find that the squeezing properties of the fluorescence radiation are significantly influenced by the presence of vacuum-induced coherence in the atomic system. It is shown that such coherence induces spectral squeezing in phase quadratures of the fluorescence light for both weak and strong driving fields. The dependence of the squeezing spectrum on the relative phase of the driving fields is also investigated. Effects such as enhancement or suppression of the squeezing peaks are shown in the spectrum as the relative phase is varied. An analytical explanation of the numerical findings is presented using dressed-states of the atom-field system.

arXiv comment10 pages, 6 figures

References in corpus (9)

• Fluorescence control through multiple interference mechanisms
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• X-ray quantum optics with Mössbauer nuclei embedded in thin film cavities
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• Interference in the resonance fluorescence of two incoherently coupled transitions
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• Interference-assisted squeezing in fluorescence radiation
• Fluorescence control through vacuum induced coherences
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Cited by in corpus (1)

• Quantum interference in the resonance fluorescence of a $J=1/2$-$J^{\prime }=1/2$ atomic system: Quantum beats, nonclassicality, and non-Gaussianity