Reconstructing the dark energy potential

Abstract

Dark energy equation of state can be effectively described by that of a\nbarotropic fluid. The barotropic fluid model describes the background evolution\nand the functional form of the equation of state parameter is well constrained\nby the observations. Equally viable explanations of dark energy are via scalar\nfield models, both canonical and non-canonical; these scalar field models being\nlow energy descriptions of an underlying high energy theory. In this paper, we\nattempt to reconcile the two approaches to dark energy by way of reconstructing\nthe evolution of the scalar field potential. For this analysis, we consider\ncanonical quintessence scalar field and the phantom field for this\nreconstruction. We attempt to understand the analytical or semi-analytical\nforms of scalar field potentials corresponding to typical well behaved\nparameterisations of dark energy using the constraints from recent\nobservations.\n