158 citations · 470 across the 10 of their papers we have counts for
10 papers
Reconstructing the evolution of dark energy with variations of fundamental parameters
N. J. Nunes, T. Dent, C. J. A. P. Martins +1
Under the assumption that the variations of parameters of nature and the current acceleration of the universe are related and governed by the evolution of a single scalar field, we…
Non-linear non-local Cosmology
N. J. Nunes, D. J. Mulryne
Non-local equations of motion contain an infinite number of derivatives and commonly appear in a number of string theory models. We review how these equations can be rewritten in t…
Constraints on a scale invariant power spectrum from superinflation in LQC
D. J. Mulryne, N. J. Nunes
The computation of the spectrum of primordial perturbations, generated by a scalar field during the super-inflationary phase of Loop Quantum Cosmology, is revisited. The calculatio…
Inflation: A graceful entrance from Loop Quantum Cosmology
N. J. Nunes
The evolution of a scalar field is explored taking into account the presence of a background fluid in a positively curved Universe in the framework of loop quantum cosmology. Thoug…
On the stability of field-theoretical regularizations of negative tension branes
N. J. Nunes, Marco Peloso
Any attempt to regularize a negative tension brane through a bulk scalar requires that this field is a ghost. One can try to improve in this aspect in a number of ways. For instanc…
Number counts in homogeneous and inhomogeneous dark energy models
N. J. Nunes, A. C. da Silva, N. Aghanim
In the simple case of a constant equation of state, redshift distribution of collapsed structures may constrain dark energy models. Different dark energy models having the same ene…