Applicability of the Wigner functional approach to evolution of quantum fields
High Energy Physics - Phenomenology
2016-12-20 v2 Nuclear Theory
Abstract
Evolution of highly excited quantum field is considered in the framework of Keldysh formalism . It is demonstrated that leading order (LO) term of semiclassical approximation appears as well-known Classical Statistical Approximation (CSA). In simple case of spatially homogeneous scalar field analytical expressions for leading and next-to-leading (NLO) order are presented. It is shown that the range of applicability of CSA strongly depends on the properties of the initial state of the system
Keywords
Cite
@article{arxiv.1608.04580,
title = {Applicability of the Wigner functional approach to evolution of quantum fields},
author = {Andrey Leonidov and Anna Radovskaya},
journal= {arXiv preprint arXiv:1608.04580},
year = {2016}
}
Comments
Based on talk given at the 19th Intenational Seminar QUARKS 2016