Thermal equilibrium and efficient evaporation of an ultracold atom-molecule mixture

Abstract

We derive the equilibrium conditions for a thermal atom-molecule mixture near a Feshbach resonance. Under the assumption of low collisional loss, thermodynamical properties are calculated and compared to the measurements of a recent experiment on fermionic lithium experiment. We discuss and evaluate possible collision mechanisms which can lead to atom-molecule conversion. Finally, we propose a novel evaporative cooling scheme to efficiently cool the molecules toward Bose-Einstein condensation.

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Cited by in corpus (30)

• Feshbach Resonances in Ultracold Gases
• Production of cold molecules via magnetically tunable Feshbach resonances
• Precise characterization of ^6Li Feshbach resonances using trap-sideband resolved RF spectroscopy of weakly bound molecules
• Formation and interactions of cold and ultracold molecules: new challenges for interdisciplinary physics
• Correlations and Pair Formation in a Repulsively Interacting Fermi Gas
• Atom-Dimer Scattering in a Three-Component Fermi Gas
• Efficient creation of molecules from a cesium Bose-Einstein condensate
• Atom Loss Maximum in Ultra-cold Fermi Gases
• Connecting few-body inelastic decay to many-body correlations: a weakly coupled impurity in a resonant Fermi gas
• Observation of Chemical Reactions between a Trapped Ion and Ultracold Feshbach Dimers
• Many-body Chemical Reactions in a Quantum Degenerate Gas
• Phase diagrams for an ideal gas mixture of fermionic atoms and bosonic molecules
• Reaction kinetics of ultracold molecule-molecule collisions
• Molecular Bose-Einstein condensation in a versatile low power crossed dipole trap
• All-optical production and transport of a large ${}^6$Li quantum gas in a crossed optical dipole trap
• Theory of Feshbach molecule formation in a dilute gas during a magnetic field ramp
• Pair fraction in a finite temperature Fermi gas on the BEC side of the BCS-BEC crossover
• Cloud shape of a molecular Bose-Einstein condensate in a disordered trap: a case study of the dirty boson problem
• Dynamics of Feshbach Molecules in an Ultracold Three-Component Mixture
• Exploring emergent heterogeneous phases in strongly repulsive Fermi gases
• Atom-molecule equilibration in a degenerate Fermi gas with resonant interactions
• Pair correlations in the normal phase of an attractive Fermi gas
• Experimental setup for studying an ultracold mixture of trapped Yb${}^{+}$-${}^6$Li
• Core repulsion effects in alkali trimers
• Endpoint thermodynamics of an atomic Fermi gas subject to a Feshbach resonance
• Adiabatic cooling of a tunable Bose-Fermi mixture in an optical lattice
• Molecular formations in ultracold mixtures of interacting and noninteracting atomic gases
• Experimental realization of BCS-BEC crossover physics with a Fermi gas of atoms
• Statistical mechanics of a Feshbach coupled Bose-Fermi gas in an optical lattice
• Optically trapped Feshbach molecules of fermionic ${}^{161}$Dy and ${}^{40}$K: Role of light-induced and collisional losses