Renormalization group, dimer-dimer scattering, and three-body forces
Quantum Gases
2014-11-20 v2 Nuclear Theory
Atomic Physics
Abstract
We study the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for systems of nonrelativistic fermions, using the same functional renormalisation technique as previously applied to fermionic matter. We find a strong dependence on the cutoff function used in the renormalisation flow for a two-body truncation of the action. Adding a simple three-body term substantially reduces this dependence.
Cite
@article{arxiv.0911.4608,
title = {Renormalization group, dimer-dimer scattering, and three-body forces},
author = {Boris Krippa and Niels R. Walet and Michael C. Birse},
journal= {arXiv preprint arXiv:0911.4608},
year = {2014}
}
Comments
5 pages, 2 pictures