Convergence of a renormalization group approach to dimer-dimer scattering
arXiv:1011.5852 · doi:10.1103/PhysRevA.83.023621
Abstract
We study the convergence of a functional renormalisation group technique by looking at the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for a system of nonrelativistic fermions. We find that in a systematic expansion in powers of the fields there is a rapid convergence of the result that agrees with know exact results.
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