38 citations · 86 across the 7 of their papers we have counts for
7 papers
On a proof of the collapse conjecture for a diagonal Bianchi type-IX vacuum space-time
T. Charters
It is given a simple proof of the collapse conjecture for a diagonal Bianchi type-IX vacuum space-time. It is shown that the codimension of the infinity stable attractor, restricte…
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…
Scalar field phase dynamics in preheating
T. Charters, A. Nunes, J. P. Mimoso
We study the model of a massive inflaton field coupled to another scalar filed with interaction term for the first stage of preheating. We obtain the the behavi…
Phase dynamics and particle production in preheating
T. Charters, A. Nunes, J. P. Mimoso
We study a simple model of a massive inflaton field coupled to another scalar filed with interaction term . We use the theory developed by Kofman {\em et al.} (P…
Stability analysis of cosmological models through Liapunov's method
Tiago C. Charters, Ana Nunes, Jose P. Mimoso
We investigate the general asymptotic behaviour of Friedman-Robertson-Walker (FRW) models with an inflaton field, scalar-tensor FRW cosmological models and diagonal Bianchi-IX mode…
Scaling solutions from interacting fluids
Ana Nunes, Jose P. Mimoso, Tiago C. Charters
We examine the dynamical implications of an interaction between some of the fluid components of the universe. We consider the combination of three matter components, one of which i…
Slow-roll inflation without fine-tuning
Tiago Charters, Jose P. Mimoso, Ana Nunes
The slow-roll approximation is the usual starting point to study the constraints imposed on the inflaton potential parameters by the observational data. We show that, for a potenti…