Effect of depolarizing and quenching collisions on contrast of the coherent population trapping resonance

We investigate the effect of buffer gases on the coherent population trapping resonance induced by a \(\sigma\)-polarized optical field in \(^{87}\)Rb atoms. Our experimental results show that inert gases, which depolarize the excited state of the alkali-metal atoms, provide higher contrast than nit...

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Published inarXiv.org
Main Authors Sabakar, K M, Vaskovskaya, M I, Chuchelov, D S, Tsygankov, E A, Vassiliev, V V, Zibrov, S A, Velichansky, V L
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 01.05.2023
Subjects
Atomic clocks
Depolarization
Mixtures
Nitrogen
Rare gases
Resonance
Trapping
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Summary:We investigate the effect of buffer gases on the coherent population trapping resonance induced by a \(\sigma\)-polarized optical field in \(^{87}\)Rb atoms. Our experimental results show that inert gases, which depolarize the excited state of the alkali-metal atoms, provide higher contrast than nitrogen that effectively quenches their fluorescence. We also demonstrate that elimination of the spontaneous radiation does not significantly decrease the width at moderate temperatures of an atomic medium. Therefore, a mixture of inert gases can be preferable over a mixture with nitrogen for atomic clocks.
ISSN:2331-8422