Two-field Cosmological $\alpha$-attractors with Noether Symmetry
High Energy Physics - Theory
2019-04-29 v3
Abstract
We study Noether symmetries in two-field cosmological -attractors, investigating the case when the scalar manifold is an elementary hyperbolic surface. This encompasses and generalizes the case of the Poincare disk. We solve the conditions for the existence of a `separated' Noether symmetry and find the form of the scalar potential compatible with such, for any elementary hyperbolic surface. For this class of symmetries, we find that the -parameter must have a fixed value. Using those Noether symmetries, we also obtain many exact solutions of the equations of motion of these models, which were studied previously with numerical methods.
Keywords
Cite
@article{arxiv.1809.10563,
title = {Two-field Cosmological $\alpha$-attractors with Noether Symmetry},
author = {Lilia Anguelova and Elena Mirela Babalic and Calin Iuliu Lazaroiu},
journal= {arXiv preprint arXiv:1809.10563},
year = {2019}
}
Comments
65 pages; references and appendix added