Molecular production in two-component atomic Fermi gases

Abstract

We provide a practical approach to the molecular production via linear downward sweeps of Feshbach resonances in degenerate Fermi gases containing incoherent mixtures of two atomic spin states. We show that the efficiency of the association of atoms is determined just by the Landau-Zener parameter in addition to the density of the gas. Our approach of pairwise summation of the microscopic binary transition probabilities leads to an intuitive explanation for the observed saturation of the molecular production and recovers all atomic loss curves of C.A. Regal et al. [Nature (London) 427, 47 (2003)] as well as K.E. Strecker et al. [Phys. Rev. Lett. 91, 080406 (2003)] without adjustable parameters.

4 pages, 3 eps figures; final version

References in corpus (17)

• Observation of Bose-Einstein Condensation of Molecules
• Creation of ultracold molecules from a Fermi gas of atoms
• Atom--Molecule Coherence in a Bose-Einstein Condensate
• Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
• Production of Long-Lived Ultracold Li2 Molecules from a Fermi gas
• Pure Gas of Optically Trapped Molecules Created from Fermionic Atoms
• Measurement of positive and negative scattering lengths in a Fermi gas of atoms
• Observation of molecules produced from a Bose-Einstein condensate
• Formation of Quantum-Degenerate Sodium Molecules
• Trapped Fermi gases
• Very high precision bound state spectroscopy near a ${}^{85}$Rb Feshbach resonance
• Dissociation and Decay of Ultra-cold Sodium Molecules
• Adiabatic association of ultracold molecules via magnetic field tunable interactions
• Dissociation of ultracold molecules with Feshbach resonances
• Collective molecule formation in a degenerate Fermi gas via a Feshbach resonance
• On the conversion efficiency of ultracold fermionic atoms to bosonic molecules via Feshbach resonances
• Atom-molecule equilibration in a degenerate Fermi gas with resonant interactions

Cited by in corpus (13)

• Production of cold molecules via magnetically tunable Feshbach resonances
• Production Efficiency of Ultracold Feshbach Molecules in Bosonic and Fermionic Systems
• Many-body effects on adiabatic passage through Feshbach resonances
• Universality in Phase Transitions for Ultracold Fermionic Atoms
• Nonlinear adiabatic passage from fermion atoms to boson molecules
• Feshbach molecule formation in a Bose-Fermi mixture
• Production efficiency of Feshbach molecules in fermion systems
• Theory of Feshbach molecule formation in a dilute gas during a magnetic field ramp
• Role of Particle Interactions in the Feshbach Conversion of Fermion Atoms to Bosonic Molecules
• Molecular production at a wide Feshbach resonance in Fermi-gas of cooled atoms
• Formation of molecules from a Cs Bose-Einstein condensate
• Strong-coupling limit in cold-molecule formation via photoassociation or Feshbach resonance through Nikitin exponential resonance crossing
• Spin correlations and entanglement in partially magnetised ensembles of fermions