Three-body problem in Fermi gases with short-range interparticle interaction

Abstract

We discuss 3-body processes in ultracold two-component Fermi gases with short-range intercomponent interaction characterized by a large and positive scattering length $a$. It is found that in most cases the probability of 3-body recombination is a universal function of the mass ratio and $a$, and is independent of short-range physics. We also calculate the scattering length corresponding to the atom-dimer interaction.

4 pages, 2 figures

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• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• Decay of an ultracold fermionic lithium gas near a Feshbach resonance
• Measurement of the Zero Crossing in a Feshbach Resonance of Fermionic 6-Li
• Magnetic field control of elastic scattering in a cold gas of fermionic lithium atoms

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