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Cosmological dynamics of the tachyon with an inverse power-law potential

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arxiv astro-ph/0307208 v1 pith:L74SZUVH submitted 2003-07-10 astro-ph

L. Raul W. Abramo , Fabio Finelli This is my paper · ORCID
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keywords alphadynamicspotentialtachyoncosmologicaldustinversepower-law
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abstract

We investigate tachyon dynamics with an inverse power-law potential $V(\phi) \propto \phi^{-\alpha}$. We find global attractors of the dynamics leading to a dust behaviour for $\alpha > 2$ and to an accelerating universe for $0 < \alpha \le 2$. We study linear cosmological perturbations and we show that metric fluctuations are constant on large scales in both cases. In presence of an additional perfect fluid, the tachyon with this potential behaves as dust or dark energy.

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Cited by 1 Pith paper

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  1. 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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