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Cosmological dynamics of tachyonic teleparallel dark energy

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arxiv 1305.5896 v2 pith:XVY3E5JQ submitted 2013-05-25 gr-qc

G. Otalora This is my paper · ORCID
classification gr-qc
keywords energyfielddarkscalarteleparallelcoupledgravitationnon-minimally
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abstract

A detailed dynamical analysis of the tachyonic teleparallel dark energy model, in which a non-canonical scalar field (tachyon field) is non-minimally coupled to gravitation, is performed. It is found that, when the non-minimal coupling is ruled by a dynamically changing coefficient $\alpha\equiv f_{,\phi}/\sqrt{f}$, with $f(\phi)$ an arbitrary function of the scalar field $\phi$, the universe may experience a field-matter-dominated era "$\phi$MDE", in which it has some portions of the energy density of $\phi$ in the matter dominated era. This is the most significant difference in relation to the so-called teleparallel dark energy scenario, in which a canonical scalar field (quintessence) is non-minimally coupled to gravitation.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Conformal Gravity and Transformations in the Symmetric Teleparallel Framework

    gr-qc 2019-08 conditional novelty 6.0 of 10

    A conformally invariant gravity action built from the square of a non-metricity scalar gives second-order field equations in symmetric teleparallel gravity.

  2. An Interplay Between Fractional Calculus and Holographic Dark Energy

    gr-qc 2026-06 unverdicted novelty 5.0 of 10

    Introduces Fractional Holographic Dark Energy (FHDE) via fractionally corrected entropy from a modified Wheeler-DeWitt equation and studies its late-time cosmology, field reconstructions, and extensions to modified gr...

  3. Higgs-like inflation in scalar-torsion $f(T,\phi)$ gravity in light of ACT-SPT-DESI constraints

    gr-qc 2025-12 conditional novelty 5.0 of 10

    Higgs-like inflation in f(T,φ) torsion gravity can accommodate the ACT/DESI upward shift in the scalar spectral index while predicting a tensor-to-scalar ratio r≈0.01–0.04.

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