Looking for defects in the 2PI correlator

Details Looking for defects in the 2PI correlator Looking for defects in the 2PI correlator

2006-07-26

arxiv.org/abs/hep-ph/0607292v1

JHEP 0611:020,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 6 figures

Scientific paper

10.1088/1126-6708/2006/11/020

Truncations of the 2PI effective action are seen as a promising way of studying non-equilibrium dynamics in quantum field theories. We probe their applicability in the non-perturbative setting of topological defect formation in a symmetry-breaking phase transition, by comparing full classical lattice field simulations and the 2PI formulation for classical fields in an O($N$) symmetric scalar field theory. At next-to-leading order in 1/N, the 2PI formalism fails to reproduce any signals of defects in the two-point function. This suggests that one should be careful when applying the 2PI formalism for symmetry breaking phase transitions.

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