Collisional stability of fermionic Feshbach molecules

Abstract

Using a Feshbach resonance, we create ultracold fermionic molecules starting from a Bose-Fermi atom gas mixture. The resulting mixture of atoms and weakly bound molecules provides a rich system for studying few-body collisions because of the variety of atomic collision partners for molecules; either bosonic, fermionic, or distinguishable atoms. Inelastic loss of the molecules near the Feshbach resonance is dramatically affected by the quantum statistics of the colliding particles and the scattering length. In particular, we observe a molecule lifetime as long as 100 ms near the Feshbach resonance.

4 pages, 4 figures, 1 table

References in corpus (4)

• Weakly bound dimers of fermionic atoms
• Quo vadis, cold molecules? - Editorial review
• Scattering Length Scaling Laws for Ultracold Three-Body Collisions
• Limits on Universality in Ultracold Three-Boson Recombination

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• Association of ultracold double-species bosonic molecules
• Phase separation and collapse in Bose-Fermi mixtures with a Feshbach resonance
• Magnetic ordering and quantum statistical effects in strongly repulsive Fermi-Fermi and Bose-Fermi mixtures
• Stability and pairing in quasi-one-dimensional Bose-Fermi mixtures
• Heteronuclear quantum gas mixtures
• Photonic Feshbach Resonance