173 citations · 173 across the 2 of their papers we have counts for
5 papers
Future supernovae data and quintessence models
Elisa Di Pietro, Jean-Francois Claeskens
The possibility to unambiguously determine the equation-of-state of the cosmic dark energy with existing and future supernovae data is investigated. We consider four evolution laws…
Scale factor duality in quintessence models ?
Elisa Di Pietro
We consider several kinds of quintessence models in the framework of scale factor duality. We show that this symmetry exists only for a very small number of quintessence potentials…
A constant equation of state for quintessence ?
Elisa Di Pietro, Jacques Demaret
Quintessence is often invoked to explain the universe acceleration suggested by the type Ia supernovae observations. The aim of this letter is to study the validity of using a cons…
Scale-factor duality in string Bianchi cosmologies
Elisa Di Pietro, Jacques Demaret
We apply the scale factor duality transformations introduced in the context of the effective string theory to the anisotropic Bianchi-type models. We find dual models for all the B…
O(d,d)-invariance in inhomogeneous string cosmologies with perfect fluid
Jacques Demaret, Elisa Di Pietro
In the first part of the present paper, we show that O(d,d)-invariance usually known in a homogeneous cosmological background written in terms of proper time can be extended to bac…