Asymmetric resonance fluorescence spectra in partially coherent fields
P. L. Knight, W. A. Molander, and C. R. Stroud, Jr.
Phys. Rev. A 17, 1547 (1978).
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A simple physical model is presented which explains the asymmetry recently
predicted in the fluorescence spectra from a two-level atom driven slightly
off resonance by a partially coherent field. The asymmetry is due to a
continuing reinitiation of the transient response of the atom as its dipole
moment tries to settle down to a steady-state phase relation with the
fluctuating applied field. A Lorentz-model calculation based on this idea
is able to give a qualitative explanation of the spectra at all field
strengths, and a quantitative explanation of the low-intensity spectra.
The predicted spectra are compared with those recently derived by Kimble
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