Functional renormalisation group approach to far-from-equilibrium quantum field dynamics
| dc.creator | Gasenzer, Thomas | |
| dc.creator | Pawlowski, Jan M. | |
| dc.date | 2007-10-25 | |
| dc.date | 2008-11-27 | |
| dc.date.accessioned | 2026-07-07T12:04:40Z | |
| dc.date.available | 2026-07-07T12:04:40Z | |
| dc.description | Dynamic equations for quantum fields far from equilibrium are derived by use of functional renormalisation group techniques. The obtained equations are non-perturbative and lead substantially beyond mean-field and quantum Boltzmann type approximations. The approach is based on a regularised version of the generating functional for correlation functions where times greater than a chosen cutoff time are suppressed. As a central result, a time evolution equation for the non-equilibrium effective action is derived, and the time-evolution of the Green functions is computed within a vertex expansion. It is shown that this agrees with the dynamics derived from the 1/N-expansion of the two-particle irreducible effective action. | |
| dc.description | 6 pages, RevTeX, 5 figures, published version | |
| dc.identifier | https://arxiv.org/abs/0710.4627 | |
| dc.identifier | http://arxiv.org/abs/0710.4627 | |
| dc.identifier | Phys. Lett. B 670, 135 (2008) | |
| dc.identifier | doi:10.1016/j.physletb.2008.10.049 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/208165 | |
| dc.subject | Other Condensed Matter | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Functional renormalisation group approach to far-from-equilibrium quantum field dynamics | |
| dc.type | text |