Self-consistent Spectral Functions in the $O(N)$ Model from the FRG
High Energy Physics - Theory
2017-07-07 v2 Quantum Gases
High Energy Physics - Phenomenology
Abstract
We present the first self-consistent direct calculation of a spectral function in the framework of the Functional Renormalization Group. The study is carried out in the relativistic model, where the full momentum dependence of the propagators in the complex plane as well as momentum-dependent vertices are considered. The analysis is supplemented by a comparative study of the Euclidean momentum dependence and of the complex momentum dependence on the level of spectral functions. This work lays the groundwork for the computation of full spectral functions in more complex systems.
Keywords
Cite
@article{arxiv.1611.05036,
title = {Self-consistent Spectral Functions in the $O(N)$ Model from the FRG},
author = {Nils Strodthoff},
journal= {arXiv preprint arXiv:1611.05036},
year = {2017}
}
Comments
12 pages, 8 figures; v2: matches published version