Stability of fermionic Feshbach molecules in a Bose-Fermi mixture

Details Stability of fermionic Feshbach molecules in a Bose-Fermi mixture Stability of fermionic Feshbach molecules in a Bose-Fermi mixture

2006-03-31

arxiv.org/abs/cond-mat/0604006v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevA.74.012709

In the wake of successful experiments in Fermi condensates, experimental attention is broadening to study resonant interactions in degenerate Bose-Fermi mixtures. Here we consider the properties and stability of the fermionic molecules that can be created in such a mixture near a Feshbach resonance (FR). To do this, we consider the two-body scattering matrix in the many-body environment, and assess its complex poles. The stability properties of these molecules strongly depend on their centre-of-mass motion, because they must satisfy Fermi statistics. At low centre-of-mass momenta the molecules are more stable than in the absence of the environment (due to Pauli-blocking effects), while at high centre-of-mass momenta nontrivial many body effects render them somewhat less stable.

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