Reconstructing a String-Inspired Non-minimally Coupled Quintom Model

TL;DR

This paper extends a string-inspired quintom dark energy model by incorporating non-minimal coupling to gravity, exploring its behavior under various dark energy parametrizations.

Contribution

It introduces a novel non-minimally coupled tachyonic scalar field model for dark energy, generalizing previous minimally coupled frameworks.

Findings

Reconstructed the model for three dark energy parametrizations.

Analyzed the impact of non-minimal coupling on dark energy dynamics.

Provided insights into the model's potential observational signatures.

Abstract

Motivated by the recent work of Zhang and Chen \cite{bin}, we generalize their work to the non-minimally coupled case. We consider a quintom model of dark energy with a single scalar field $T$ given by a Lagrangian which inspired by tachyonic Lagrangian in string theory. We consider non-minimal coupling of tachyon field to the scalar curvature, then we reconstruct this model in the light of three forms of parametrization for dynamical dark energy.