Coupled tachyonic dark energy: a dynamical analysis

Ricardo C. G. Landim

Coupled tachyonic dark energy: a dynamical analysis

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arxiv 1505.03243 v2 pith:W5PTN2L5 submitted 2015-05-13 hep-th astro-ph.CO

Ricardo C. G. Landim This is my paper · ORCID

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keywords darkenergymattertachyonicanalysiscoupleddynamicalradiation

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abstract

In this paper we present a dynamical analysis for a coupled tachyonic dark energy with dark matter. The tachyonic field $\phi$ is considered in the presence of barothropic fluids (matter and radiation) and the autonomous system due to the evolution equations is studied. The three cosmological eras (radiation, matter and dark energy) are described through the critical points, for a generic potential $V(\phi)$.

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Kinetic coupled tachyon: A dynamical system analysis
gr-qc 2024-12 conditional novelty 6.0 of 10

A kinetically coupled tachyon dark energy model admits a new stable scaling attractor for a range of coupling and potential parameters, providing a mechanism to keep dark energy and dark matter densities comparable.

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