On the derivation of effective field theories
| dc.creator | Uzunov, Dimo I. | |
| dc.date | 2004-12-11 | |
| dc.date.accessioned | 2026-07-07T07:57:40Z | |
| dc.date.available | 2026-07-07T07:57:40Z | |
| dc.description | A general self-consistency approach allows a thorough treatment of the corrections to the standard mean-field approximation (MFA). The natural extension of standard MFA with the help of a cumulant expansion leads to a new point of view on the effective field theories. The proposed approach can be used for a systematic treatment of fluctuation effects of various length scales and, perhaps, for the development of a new coarse graining procedure. We outline and justify our method by some preliminary calculations. Concrete results are given for the critical temperature and the Landau parameters of the $ϕ^4_d$-theory - the field counterpart of the Ising model. An important unresolved problem of the modern theory of phase transitions - the problem for the calculation of the true critical temperature, is considered within the framework of the present approach. A comprehensive description of the ground state properties of many-body systems is also demonstrated. | |
| dc.description | 14 pages; Preprint CITP (Trieste): IC/2004/123 | |
| dc.identifier | https://arxiv.org/abs/hep-lat/0412018 | |
| dc.identifier | http://arxiv.org/abs/hep-lat/0412018 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/127732 | |
| dc.subject | High Energy Physics - Lattice | |
| dc.title | On the derivation of effective field theories | |
| dc.type | text |