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Qualitative Analysis of Early Universe Cosmologies

Andrew P Billyard·Alan A Coley·James E Lidsey
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Abstract

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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Andrew P Billyard, Alan A Coley, James E Lidsey. 1999-07-11. Qualitative Analysis of Early Universe Cosmologies. https://doi.org/10.1063/1.533017

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