Flow equation of functional renormalization group for three-body scattering problems
arXiv:1304.3286 · doi:10.1093/ptep/ptt092
Abstract
Functional renormalization group (FRG) is applied to the three-body scattering problem in the two-component fermionic system with an attractive contact interaction. We establish a new and correct flow equation on the basis of FRG and show that our flow equation is consistent with integral equations obtained from the Dyson-Schwinger equation. In particular, the relation of our flow equation and the Skornyakov and Ter-Martirosyan equation for the atom-dimer scattering is made clear.
13 pages, 13 figures
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