2020
DOI: 10.1070/qel17064
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Effect of collisions on the shape of the coherent population trapping resonance detected by the Ramsey method

Abstract: We report on a theoretical model of the effect of coherent population trapping in alkali atoms in an optically thin gas cell with a buffer gas at a nonzero temperature in a pulsed laser field. The shape of the Ramsey resonance is analysed for two different temperature ranges, i. e. for a ‘cold’ atomic ensemble and for an ensemble of ‘hot’ atoms in a cell with a buffer gas. The influence of the hyperfine structure of the excited level on the shift of the central Ramsey resonance is investigated.

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Cited by 4 publications
(1 citation statement)
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“…At the same time, it is well known that taking into account the real atomic structure leads to qualitative features that do not allow description by means of a simple three-level model [68]. So, in the case of CPC, it turns out [69][70][71] that taking into account already one additional excited state in the theoretical description leads to significant differences from the predictions obtained when describing such phenomena in the framework of a threelevel lambda model.…”
Section: Introductionmentioning
confidence: 97%
“…At the same time, it is well known that taking into account the real atomic structure leads to qualitative features that do not allow description by means of a simple three-level model [68]. So, in the case of CPC, it turns out [69][70][71] that taking into account already one additional excited state in the theoretical description leads to significant differences from the predictions obtained when describing such phenomena in the framework of a threelevel lambda model.…”
Section: Introductionmentioning
confidence: 97%