Dimer-dimer collisions at finite energies in two-component Fermi gases

Details Dimer-dimer collisions at finite energies in two-component Fermi gases Dimer-dimer collisions at finite energies in two-component Fermi gases

2008-06-18

arxiv.org/abs/0806.3062v3

Phys. Rev. A 79, 030501 (2009)

Physics

Atomic Physics

4.1 pages, 3 figures, revised text. Supplemental material provided: 2 pages, 2 figures

Scientific paper

10.1103/PhysRevA.79.030501

We introduce 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 energy-dependent 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.

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