Dynamics of chiral cosmology. (9th September 2020)

• Record Type: Journal Article
• Authors: Paliathanasis, Andronikos
• Is Part Of: Classical and quantum gravity. Volume 37:Number 19(2020:Oct.)
• Publication Date: 2020-09-09
• Subjects: cosmology -- scalar field -- chiral cosmology -- dark energy -- stability; Quantum gravity -- Periodicals; Gravitation -- Periodicals; Relativity (Physics) -- Periodicals; Space and time -- Periodicals; Periodicals; 521.1
• DOI: 10.1088/1361-6382/aba667
• Languages: English
• ISSNs: 0264-9381

Abstract

Abstract: We perform a detailed analysis for the dynamics of chiral cosmology in a spatially flat Friedmann–Lemaître–Robertson–Walker Universe with a mixed potential term. The stationary points are categorized in four families. Previous results in the literature are recovered while new phases in the cosmological evolution are found. From our analysis we find nine different cosmological solutions, the eight describe scaling solutions, where the one is that of a pressureless fluid, while only one de Sitter solution is recovered.