Four-Body Problem and BEC-BCS Crossover in a Quasi-One-Dimensional Cold Fermion Gas
Christophe Mora, A. Komnik, Reinhold Egger +1 more
The four-body problem for an interacting two-species Fermi gas is solved analytically in a confined quasi-one-dimensional geometry, where the two-body atom-atom scattering length a(aa) displays a confinement-induced resonance. We compute the dimer-dimer scattering length a(dd) and show that this quantity completely determines the many-body solution of the associated BEC-BCS crossover phenomenon in terms of bosonic dimers.
arXiv:cond-mat/0501641•Physical Review Letters•Aug 19, 2005•38 citations