Weakly bound dimers of fermionic atoms

D. Petrov 1, 2, Christophe Salomon 3, Gora V. Shlyapnikov 1, 2, 3

Physical Review Letters 93 (2004) 090404

We discuss the behavior of weakly bound bosonic dimers formed in a cold Fermi gas at a large positive scattering length $a$ for the interspecies interaction. We find the exact solution for the dimer-dimer elastic scattering and obtain a strong decrease of their collisional relaxation and decay with increasing $a$. The large ratio of the elastic to inelastic rate is promising for achieving Bose-Einstein condensation of the dimers and cooling the condensed gas to very low temperatures.

  • 1. FOM Institute for Atomic and Molecular Physics,
    Institut for Atomic and Molecular Physics
  • 2. National Research Centre "Kurchatov Institute" (NRC KI),
    University of Moscow
  • 3. Laboratoire Kastler Brossel (LKB (Lhomond)),
    CNRS : UMR8552 – Université Paris VI - Pierre et Marie Curie – Ecole Normale Supérieure de Paris - ENS Paris