Tachyon field non-minimally coupled to massive neutrino matter

TL;DR

This paper explores how a non-minimally coupled rolling tachyon field interacting with massive neutrino matter can lead to late-time cosmic acceleration, providing a potential explanation for dark energy.

Contribution

It introduces a model where non-minimal coupling of tachyon fields with neutrino matter induces late-time acceleration, a novel approach in dark energy research.

Findings

Non-minimal coupling creates a potential minimum for the tachyon field.

The model can produce late-time acceleration with appropriate parameters.

The approach aligns with string-inspired potential models.

Abstract

In this paper, we consider rolling tachyon, with steep run-away type of potentials non-minimally coupled to massive neutrino matter. The coupling dynamically builds up at late times as neutrino matter turns non-relativistic. In case of scaling and string inspired potentials, we have shown that non-minimal coupling leads to minimum in the field potential. Given a suitable choice of model parameters, it is shown to give rise to late-time acceleration with the desired equation of state.