dorsal/arxiv
View SchemaTheory of Dicke narrowing in coherent population trapping
| Authors | O. Firstenberg, M. Shuker, A. Ben-Kish, D. R. Fredkin, N. Davidson, A. Ron |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0701008 |
| URL | https://arxiv.org/abs/quant-ph/0701008 |
| DOI | 10.1103/PhysRevA.76.013818 |
| Journal | Phys. Rev. A 76, 013818 (2007) |
Abstract
The Doppler effect is one of the dominant broadening mechanisms in thermal vapor spectroscopy. For two-photon transitions one would naively expect the Doppler effect to cause a residual broadening, proportional to the wave-vector difference. In coherent population trapping (CPT), which is a narrow-band phenomenon, such broadening was not observed experimentally. This has been commonly attributed to frequent velocity-changing collisions, known to narrow Doppler-broadened one-photon absorption lines (Dicke narrowing). Here we show theoretically that such a narrowing mechanism indeed exists for CPT resonances. The narrowing factor is the ratio between the atom's mean free path and the wavelength associated with the wave-vector difference of the two radiation fields. A possible experiment to verify the theory is suggested.
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"abstract": "The Doppler effect is one of the dominant broadening mechanisms in thermal\nvapor spectroscopy. For two-photon transitions one would naively expect the\nDoppler effect to cause a residual broadening, proportional to the wave-vector\ndifference. In coherent population trapping (CPT), which is a narrow-band\nphenomenon, such broadening was not observed experimentally. This has been\ncommonly attributed to frequent velocity-changing collisions, known to narrow\nDoppler-broadened one-photon absorption lines (Dicke narrowing). Here we show\ntheoretically that such a narrowing mechanism indeed exists for CPT resonances.\nThe narrowing factor is the ratio between the atom\u0027s mean free path and the\nwavelength associated with the wave-vector difference of the two radiation\nfields. A possible experiment to verify the theory is suggested.",
"arxiv_id": "quant-ph/0701008",
"authors": [
"O. Firstenberg",
"M. Shuker",
"A. Ben-Kish",
"D. R. Fredkin",
"N. Davidson",
"A. Ron"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.76.013818",
"journal_ref": "Phys. Rev. A 76, 013818 (2007)",
"title": "Theory of Dicke narrowing in coherent population trapping",
"url": "https://arxiv.org/abs/quant-ph/0701008"
},
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