Phase-dependent fluctuations in intermittent resonance fluorescence

Abstract

Electron shelving gives rise to bright and dark periods in the resonance fluorescence of a three-level atom. The corresponding incoherent spectrum contains a very narrow inelastic peak on top of a two-level-like spectrum. Using the theories of balanced and conditional homodyne detection we study ensemble averaged phase-dependent fluctuations of intermittent resonance fluorescence. The sharp peak is found only in the spectra of the squeezed quadrature. In balanced homodyne detection that peak is positive, which greatly reduces the squeezing, also seen in its variance. In conditional homodyne detectionCHD, for weak to moderate laser intensity, the peak is negative, enhancing the squeezing, and for strong fields the sidebands become dispersive which, together with the positive sharp peak dominate the spectrum. The latter effect is due to non-negligible third order fluctuations produced by the atom-laser nonlinearity and the increased steady state population of the shelving state. A simple mathematical approach allows us to obtain accurate analytical results.

11 pages, 7 figures

References in corpus (5)

• Quadrature squeezed photons from a two-level system
• Correlation functions and conditioned quantum dynamics in photodetection theory
• Lineshape measurement of an extreme-weak amplitude-fluctuating light source by the photon-counting-based second-order correlation spectroscopy
• Intensity and amplitude correlations in the fluorescence from atoms with interacting Rydberg states
• Correlation Measurement of Squeezed Light

Cited by in corpus (10)

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• Large time-asymmetric quantum fluctuations in amplitude-intensity correlation measurements of a V-type three-level atom resonance fluorescence
• Damped Casimir radiation and photon correlation measurements
• Quantum interference in the resonance fluorescence of a $J=1/2$-$J^{\prime }=1/2$ atomic system: Quantum beats, nonclassicality, and non-Gaussianity
• Time-dependent spectra of quantum beats
• Phase-dependent fluctuations of resonance fluorescence near the coherent population trapping condition
• Ultranarrow spectral line of the radiation in double qubit-cavity ultrastrong coupling system
• Measuring fluorescence into a nanofiber by observing field quadrature noise