Skip to Main content Skip to Navigation
Theses

FORMATION OF MOLECULES IN ULTRACOLD ATOMIC GASES VIA QUASI-RESONANT FIELDS

Abstract : we study the nonlinear mean-field dynamics of diatomic molecule formation at coherent photo- and magneto-association of ultracold atoms focusing on the case when the system is initially in the all-atomic state. We show that in the limit of strongly nonlinear interaction between an ultra-cold atomic-molecular system and a quasi-resonant electromagnetic field, the molecule formation process, depending on the characteristics of the associating field, may evolve according two different scenarios, namely, weak- and strong-oscillatory regimes. In the first case the number of molecules increases without pronounced oscillations of atom-molecule populations, while in the second case high-amplitude Rabi-type oscillations arise. Assuming an arbitrary external field configuration, we construct analytical solutions to describe the system's temporal dynamics in the both interaction regimes. Further, we investigate the influence of inter-particle elastic scattering on the dynamics of coherent molecule formation subject to an external field configuration of the resonance-crossing Landau-Zener model. We derive an approximate solution which for the first time describes the whole temporal dynamics of the molecule formation in this general case.
Complete list of metadatas

Cited literature [96 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00534444
Contributor : Claude Leroy <>
Submitted on : Tuesday, November 9, 2010 - 4:27:39 PM
Last modification on : Saturday, November 21, 2020 - 11:20:07 AM
Long-term archiving on: : Thursday, February 10, 2011 - 2:52:28 AM

Identifiers

  • HAL Id : tel-00534444, version 1

Citation

R.S. Sokhoyan. FORMATION OF MOLECULES IN ULTRACOLD ATOMIC GASES VIA QUASI-RESONANT FIELDS. Physics [physics]. Université de Bourgogne; National Academy of Sciences of Armenia, 2010. English. ⟨tel-00534444⟩

Share

Metrics

Record views

267

Files downloads

188