Gauging universe expansion via scalar fields |
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| Authors: | Devanarayanan Rajeeb Kumar SD Pathak Vikash Kumar Ojha |
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| Affiliation: | 1. Department of Physics, Lovely Professional University, Phagwara 144411, Punjab, India2. Department of Physics, SVNIT Surat, Ichchhanath, Surat 395007, Gujarat, India |
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| Abstract: | In this study, we investigate the expansion of the FRLW universe in the open, closed, and flat geometries. The universe is dominated by a scalar field (spatially homogeneous) as a source of dark energy. We consider the three different classes of scalar fields – quintessence, tachyonic, and phantom field – for our analysis. A mathematical analysis is carried out by considering these three scalar fields with exponential and power-law potentials. Both potentials give exponential expansion in the open, closed, and flat FRLW universes. It is found that quintessence, tachyonic, and phantom scalar fields are indistinguishable under the slow roll approximation. |
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| Keywords: | quientessence tachyonic scalar field phantom field dark energy |
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