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.
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© 2009 The American Physical Society
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American Physical Society
D'Incao, J.P., Rittenhouse, S.T., Mehta, N.P., & Greene, C.H. (2009). Dimer-dimer collisions at finite energies in two-component Fermi gases. Physical Review A, 79(3), 030501. doi: 10.1103/PhysRevA.79.030501
Physical Review A