Abstract
A detailed dynamical analysis of the tachyonic teleparallel dark energy model, in which a noncanonical scalar field (tachyon field) is nonminimally coupled to gravitation, is performed. It is found that, when the nonminimal coupling is ruled by a dynamically changing coefficient , with an arbitrary function of the scalar field , the Universe may experience a field-matter-dominated era “,” in which it has some portions of the energy density of 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 nonminimally coupled to gravitation.
- Received 25 May 2013
DOI:https://doi.org/10.1103/PhysRevD.88.063505
© 2013 American Physical Society