69 citations · 246 across the 12 of their papers we have counts for
12 papers
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…
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…
Cluster approximations for infection dynamics on random networks
Ganna Rozhnova, Ana Nunes
In this paper, we consider a simple stochastic epidemic model on large regular random graphs and the stochastic process that corresponds to this dynamics in the standard pair appro…
Reheating induced by competing decay modes
T. Charters, A. Nunes, J. P. Mimoso
We address the problem of studying the decay of the inflaton field to another scalar field through parametric resonance in the case of a coupling that involves several deca…
Bulk viscosity impact on the scenario of warm inflation
Jose Pedro Mimoso, Ana Nunes, Diego Pavon
The decay of the inflaton into radiation and particles during the slow-roll suggests that these may interact with each other and that the latter may also decay into subproducts bef…
Asymptotic behavior of the warm inflation scenario with viscous pressure
Jose P. Mimoso, Ana Nunes, Diego Pavon
We analyze the dynamics of models of warm inflation with general dissipative effects. We consider phenomenological terms both for the inflaton decay rate and for viscous effects wi…