Renormalization of Composite Operators in time-dependent Backgrounds
High Energy Physics - Phenomenology
2013-07-16 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We study the phenomenon of composite operator renormalization and mixing in systems where time-translational invariance is broken and the evolution is out-of-equilibrium. We show that composite operators mix also through non-local memory terms which persist for periods whose duration is set by the mass scales in the problem.
Keywords
Cite
@article{arxiv.1305.6401,
title = {Renormalization of Composite Operators in time-dependent Backgrounds},
author = {Simone Dresti and Antonio Riotto},
journal= {arXiv preprint arXiv:1305.6401},
year = {2013}
}
Comments
17 pages, 2 figures. Minor corrections to match published version