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Proceedings Paper

Demkov-Kunike model in cold molecule formation
Author(s): A. Ishkhanyan
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Paper Abstract

We study the dynamics of cold molecule formation via photo- or magneto-association of quantum degenerate atomic gases for the case when the field configuration is defined by the quasi-linear level crossing Demkov-Kunike model, which is characterized by a bell-shaped pulse and finite variation of the frequency detuning. We generalize the approach developed for the Landau-Zener model and propose a cubic polynomial equation for the asymptotic transition probability at t → + ∞ applicable in the large detuning regime of the interaction process. The proposed approximation applies to all values of the Rabi frequency; hence, it presents a unified description of previously noticed weak, moderate, and strong interaction limits of the fast sweep regime. This cubic equation for the transition probability provides improvement of previous results by an order of the magnitude.

Paper Details

Date Published: 4 March 2011
PDF: 6 pages
Proc. SPIE 7998, International Conference on Laser Physics 2010, 79980T (4 March 2011); doi: 10.1117/12.890515
Show Author Affiliations
A. Ishkhanyan, Institute for Physical Research (Armenia)

Published in SPIE Proceedings Vol. 7998:
International Conference on Laser Physics 2010
Aram V. Papoyan, Editor(s)

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