Gauging Universe Expansion via Scalar Fields

Abstract In this \hl{article}, we investigate the expansion of the FRLW universe in \hl{the} open, closed, and flat geometry. The universe \hl{is} dominated by \hl{a} scalar field (spatially homogeneous) as a source of dark energy. We consider the three different \hl{classes} of scalar fields\hl{-} quintessence, tachyonic, and phantom field \hl{for our analysis}. Mathematical analysis \hl{has been} carried out by considering these three scalar fields with exponential and power-law potential. Both \hl{potentials} give exponential expansion in \hl{the} open, closed, and flat FRLW universe. \hl{It is found that quintessence, tachyonic, and phantom scalar fields are indistinguishable \textbf{under the slow roll approximation}}.