The thawing dark energy dynamics: Can we detect it?

TL;DR

This paper investigates whether current observations can distinguish thawing dark energy models, including quintessence and tachyon fields, from a cosmological constant, concluding that it is unlikely with present data.

Contribution

The study analyzes various thawing scalar field models and assesses their observational signatures, highlighting the difficulty in differentiating them from a cosmological constant with current data.

Findings

Current observations cannot distinguish thawing dark energy models from a cosmological constant.

Dark energy metamorphosis is unlikely to be observed in the near future.

Different scalar field models produce similar observational signatures.

Abstract

We consider different classes of scalar field models including quintessence, and tachyon scalar fields with a variety of generic potential belonging to thawing type. Assuming the scalar field is initially frozen at $w=-1$, we evolve the system until the present time. We focus on observational quantities like Hubble parameter, luminosity distance as well as quantities related to the Baryon Acoustic Oscillation measurement. Our study shows that with present state of observations, one can not distinguish amongst various models which in turn can not be distinguished from cosmological constant. This lead us to a conclusion that there is a thin chance to observe the dark energy metamorphosis in near future.