Few-body hierarchy in non-relativistic functional renormalization group equations and a decoupling theorem
arXiv:1301.6542 · doi:10.1016/j.nuclphysa.2014.04.013
Abstract
For non-relativistic quantum field theory in the few-body limit with instantaneous interactions it is shown within the functional renormalization group formalism that propagators are not renormalized and that the renormalization group equations of one-particle irreducible vertex functions are governed by a hierarchical structure. This hierarchy allows to solve the equations in the n-body sector without knowledge or assumptions about the m-body sectors where m>n.
9 pages, 8 figures, published version
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