Formation of Quantum-Degenerate Sodium Molecules

Abstract

Ultra-cold sodium molecules were produced from an atomic Bose-Einstein condensate by ramping an applied magnetic field across a Feshbach resonance. More than $10^5$ molecules were generated with a conversion efficiency of $\sim$4%. Using laser light resonant with an atomic transition, the remaining atoms could be selectively removed, preventing fast collisional relaxation of the molecules. Time-of-flight analysis of the pure molecular sample yielded an instantaneous phase-space density greater than 20.

5 pages, 4 figures (final published version)

References in corpus (9)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• 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
• Strongly enhanced inelastic collisions in a Bose-Einstein condensate near Feshbach resonances
• Creation of a molecular condensate by dynamically melting a Mott-insulator
• Quantum Dynamics of Ultracold Na + Na_2 collisions
• Atom loss from Bose-Einstein condensates due to Feshbach resonance
• Formation of a molecular Bose-Einstein condensate and an entangled atomic gas by Feshbach resonance

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