Title of Paper:Results from the 4PI effective action in 2- and 3-dimensions

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Date of Publication:2013-04-20

Journal:Eur.Phys.J. C

Discipline:Natural Science

First-Level Discipline:Physics

Volume:73

Issue:4

Page Number:2399

Abstract:We consider a symmetric scalar theory with quartic coupling and solve the equations of motion from the 4PI effective action in 2- and 3-dimensions using an iterative numerical lattice method. For coupling less than 10 (in dimensionless units) good convergence is obtained in less than 10 iterations. We use lattice size up to 16 in 2-dimensions and 10 in 3-dimensions and demonstrate the convergence of the results with increasing lattice size. The self-consistent solutions for the 2-point and 4-point functions agree well with the perturbative ones when the coupling is small and deviate when the

Note:arXiv:1202.3165 [hep-ph] ，论文作者按姓氏排序，*为通讯作者