We discuss a major theoretical generalization of existing techniques for handling the three-body problem that accurately describes the interactions among four fermionic atoms. Application to a two-component Fermi gas accurately determines dimer-dimer scattering parameters at finite energies and can give deeper insight into the corresponding many-body phenomena. To account for finite temperature effects, we calculate the energydependent complex dimer-dimer scattering length, which includes contributions from elastic and inelastic collisions. Our results indicate that strong finite-energy effects and dimer dissociation are crucial for understanding the physics in the strongly interacting regime for typical experimental conditions. While our results for dimer-dimer relaxation are consistent with experiment, they confirm only partially a previously published theoretical result.
Dimer-dimer collisions at finite energies in two-component Fermi gasesPhysical Review A
Document Object Identifier (DOI)10.1103/PhysRevA.79.030501
Citation InformationD’Incao, J., Seth Rittenhouse, N. Mehta, and Chris Greene. 2009. “Dimer-Dimer Collisions at Finite Energies in Two-Component Fermi Gases.” Physical Review A 79 (3): 030501. doi:10.1103/PhysRevA.79.030501.