Tachyonic matter cosmology with exponential and hyperbolic potentials

TL;DR

This paper explores tachyonic matter cosmology in a flat FRW universe using exponential and hyperbolic cosine potentials, analyzing key parameters and comparing with observations to identify the more viable model.

Contribution

It investigates the dynamics of tachyonic matter with two specific potentials and compares their observational consistency, highlighting the hyperbolic cosine potential as a better fit.

Findings

Hyperbolic cosine potential aligns well with observational data.

Both potentials influence the Hubble, deceleration, and EoS parameters.

The hyperbolic potential provides a more accurate description of the universe's evolution.

Abstract

In this paper we consider tachyonic matter in spatially at FRW universe, and obtain behavior of some important cosmological parameters for two special cases of potentials. First we assume the exponential potential and then consider hyperbolic cosine type potential. In both cases we obtain behavior of the Hubble, deceleration and EoS parameters. Comparison with observational data suggest the model with hyperbolic cosine type scalar-field potentials has good model to describe universe.