Flow Equations without Mean Field Ambiguity

Details Flow Equations without Mean Field Ambiguity Flow Equations without Mean Field Ambiguity

2002-07-05

arxiv.org/abs/hep-ph/0207094v2

Phys.Rev. D68 (2003) 025020

Physics

High Energy Physics

High Energy Physics - Phenomenology

New version to match the one published in PRD. New title (former title: Solving Mean Field Ambiguity by Flow Equations), added

Scientific paper

10.1103/PhysRevD.68.025020

We compare different methods used for non-perturbative calculations in strongly interacting fermionic systems. Mean field theory often shows a basic ambiguity related to the possibility to perform Fierz transformations. The results may then depend strongly on an unphysical parameter which reflects the choice of the mean field, thus limiting the reliability. This ambiguity is absent for Schwinger-Dyson equations or fermionic renormalization group equations. Also renormalization group equations in a partially bosonized setting can overcome the Fierz ambiguity if the truncation is chosen appropriately. This is reassuring since the partially bosonized renormalization group approach constitutes a very promising basis for the explicit treatment of condensates and spontaneous symmetry breaking even for situations where the bosonic correlation length is large.

Affiliated with

Also associated with

No associations

Rating

Flow Equations without Mean Field Ambiguity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Flow Equations without Mean Field Ambiguity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flow Equations without Mean Field Ambiguity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-587039