Time-dependent analysis of tunneling effect in the formation of ultracold molecules via photoassociation of laser-cooled atoms
- M. Vatasescu
- F. Masnou-Seeuws
DOIAbstract
The paper contains a time-dependent investigation of the tunneling effect observed in the photoassociation spectrum of Cs2 and attributed to the $0_g^-(6s,6p_{3/2})$ double well. When by photoassociation of two cold cesium atoms a vibrational level of the outer well is populated, tunneling is an efficient mechanism for transferring the population to the inner well ($R<15a_0$), where spontaneous emission may lead to formation of cold molecules in low vibrational levels of the $a^3\Sigma_u^+(6s,6s)$ electronic state. This tunneling effect is analyzed by wavepackets propagation, first considering the double well potential alone, and following a packet made by a superposition of states initially located at large distances. Characteristic times ...
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