Crossing the Cosmological Constant Line on a Warped DGP Brane

TL;DR

This paper investigates how a non-minimally coupled dark energy component on a warped DGP brane can cross the phantom divide line, with the crossing behavior influenced by model parameters like the warp factor and coupling.

Contribution

It demonstrates the conditions under which the dark energy equation of state crosses the phantom divide in a warped DGP brane model, highlighting the roles of non-minimal coupling and warp factor.

Findings

Crossing of the phantom divide line is possible in the model.

The crossing depends on the non-minimal coupling and warp factor.

Warp factor influences the redshift at which crossing occurs.

Abstract

We study dynamics of the equation of state parameter for a dark energy component non-minimally coupled to induced gravity on a warped DGP brane. We show that there are appropriate domains of the model parameters space that account for crossing of the phantom divide line. This crossing, which is possible for both branches of the scenario, depends explicitly on the values of the non-minimal coupling and warp factor. The effect of warp factor appears in the value of the redshift parameter at which phantom divide line crossing occurs.