Convergence of a renormalization group approach to dimer-dimer scattering

Details Convergence of a renormalization group approach to dimer-dimer scattering Convergence of a renormalization group approach to dimer-dimer scattering

2010-11-26

arxiv.org/abs/1011.5852v1

Phys.Rev.A83:023621,2011

Physics

Condensed Matter

Quantum Gases

Scientific paper

10.1103/PhysRevA.83.023621

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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