Physics Commons^™

Dimer-Dimer Collisions At Finite Energies In Two-Component Fermi Gases, J P. D'Incao, Seth T. Rittenhouse, Nirav P. Mehta, Chris H. Greene

Physics and Astronomy Faculty Research

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 …