Effective convergence of the 2PI-1/N expansion for nonequilibrium quantum fields
| dc.creator | Aarts, Gert | |
| dc.creator | Laurie, Nathan | |
| dc.creator | Tranberg, Anders | |
| dc.date | 2008-09-19 | |
| dc.date.accessioned | 2026-07-07T12:27:01Z | |
| dc.date.available | 2026-07-07T12:27:01Z | |
| dc.description | The 1/N expansion of the two-particle irreducible effective action offers a powerful approach to study quantum field dynamics far from equilibrium. We investigate the effective convergence of the 1/N expansion in the O(N) model by comparing results obtained numerically in 1+1 dimensions at leading, next-to-leading and next-to-next-to-leading order in 1/N as well as in the weak coupling limit. A comparison in classical statistical field theory, where exact numerical results are available, is made as well. We focus on early-time dynamics and quasi-particle properties far from equilibrium and observe rapid effective convergence already for moderate values of 1/N or the coupling. | |
| dc.description | 4 pages, 4 eps figures | |
| dc.identifier | https://arxiv.org/abs/0809.3390 | |
| dc.identifier | http://arxiv.org/abs/0809.3390 | |
| dc.identifier | Phys.Rev.D78:125028,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.125028 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215067 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Theory | |
| dc.subject | Nuclear Theory | |
| dc.title | Effective convergence of the 2PI-1/N expansion for nonequilibrium quantum fields | |
| dc.type | text |