dorsal/arxiv
View SchemaA quantum stochastic approach to the spectrum of a two-level atom
| Authors | Alberto Barchielli, Nicola Pero |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0202166 |
| URL | https://arxiv.org/abs/quant-ph/0202166 |
| DOI | 10.1088/1464-4266/4/5/308 |
| Journal | J. Opt. B: Quantum Semiclass. Opt. 4 (2002) 272-282 |
Abstract
By means of quantum stochastic calculus we construct a model for an atom with two degenerate levels and stimulated by a laser and we compute its fluorescence spectrum; let us stress that, once the model for the unitary atom-field dynamics has been given, then the spectrum is computed without further approximations. If only the absorption/emission term is included in the interaction, we reobtain the Mollow spectrum in the case of a monochromatic laser and the Kimble-Mandel spectrum in the case of a "phase diffusion model" for a non monochromatic laser. However, our model can describe also another type of light scattering, a "direct scattering" due to the response of the atom as a whole, which we expect to be small, but which interferes with the scattering due to the absorption/emission channel. When both the scattering channels are introduced we obtain a modification of the Mollow-Kimble-Mandel spectrum, which shares the main features with the usual case, but which presents some asymmetries even in the case of no detuning.
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"abstract": "By means of quantum stochastic calculus we construct a model for an atom with\ntwo degenerate levels and stimulated by a laser and we compute its fluorescence\nspectrum; let us stress that, once the model for the unitary atom-field\ndynamics has been given, then the spectrum is computed without further\napproximations. If only the absorption/emission term is included in the\ninteraction, we reobtain the Mollow spectrum in the case of a monochromatic\nlaser and the Kimble-Mandel spectrum in the case of a \"phase diffusion model\"\nfor a non monochromatic laser. However, our model can describe also another\ntype of light scattering, a \"direct scattering\" due to the response of the atom\nas a whole, which we expect to be small, but which interferes with the\nscattering due to the absorption/emission channel. When both the scattering\nchannels are introduced we obtain a modification of the Mollow-Kimble-Mandel\nspectrum, which shares the main features with the usual case, but which\npresents some asymmetries even in the case of no detuning.",
"arxiv_id": "quant-ph/0202166",
"authors": [
"Alberto Barchielli",
"Nicola Pero"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1464-4266/4/5/308",
"journal_ref": "J. Opt. B: Quantum Semiclass. Opt. 4 (2002) 272-282",
"title": "A quantum stochastic approach to the spectrum of a two-level atom",
"url": "https://arxiv.org/abs/quant-ph/0202166"
},
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