3 papers
gr-qc2019
Disformally Coupled Quintessence
Elsa M. Teixeira, Ana Nunes, Nelson J. Nunes
In this work we consider a cosmological model in which dark energy is portrayed by a canonical scalar field which is allowed to couple to the other species by means of a disformal…
gr-qc2019
Bouncing cosmology in gravity by order reduction
Bruno J. Barros, Elsa M. Teixeira, Daniele Vernieri
A bouncing universe is a viable candidate to solve the initial singularity problem. Here we consider bouncing solutions in the context of gravity by using an ord…
gr-qc2019
Conformally Coupled Tachyonic Dark Energy
Elsa M. Teixeira, Ana Nunes, Nelson J. Nunes
We present and study a conformally coupled dark energy model, characterised by an interaction between a tachyon field , with an inverse square potential , and the matter…