Molecular production at a wide Feshbach resonance in Fermi-gas of cooled atoms

Abstract

The problem of molecular production from degenerate gas of fermions at a wide Feshbach resonance, in a single-mode approximation, is reduced to the linear Landau-Zener problem for operators. The strong interaction leads to significant renormalization of the gap between adiabatic levels. In contrast to static problem the close vicinity of exact resonance does not play substantial role. Two main physical results of our theory is the high sensitivity of molecular production to the initial value of magnetic field and generation of a large BCS condensate distributed over a broad range of momenta in inverse process of the molecule dissociation.

4 pages, no figures

References in corpus (8)

• Observation of Bose-Einstein Condensation of Molecules
• Resonantly-paired fermionic superfluids
• Observation of molecules produced from a Bose-Einstein condensate
• Adiabatic association of ultracold molecules via magnetic field tunable interactions
• Many body generalization of the Landau Zener problem
• Many-body effects on adiabatic passage through Feshbach resonances
• Production efficiency of Feshbach molecules in fermion systems
• Molecular production in two-component atomic Fermi gases

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• Landau-Zener-Stueckelberg physics with a singular continuum of states
• Observation of collectivity enhanced magnetoassociation of ${}^6$Li in the quantum degenerate regime
• Analytic approach to the Landau-Zener problem in bounded parameter space