Qualitative Analysis of Early Universe Cosmologies

Details Qualitative Analysis of Early Universe Cosmologies Qualitative Analysis of Early Universe Cosmologies

1999-07-11

arxiv.org/abs/gr-qc/9907043v1

J.Math.Phys. 40 (1999) 5092

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Submitted to Journal of Mathematical Physics, 18 pages, 4 figures, uses package "graphicx" to insert figures

Scientific paper

A qualitative analysis is presented for a class of homogeneous cosmologies derived from the string effective action when a cosmological constant is present in the matter sector of the theory. Such a term has significant effects on the qualitative dynamics. For example, models exist which undergo a series of oscillations between expanding and contracting phases due to the existence of a heteroclinic cycle in the phase space. Particular analytical solutions corresponding to the equilibrium points are also found.

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