Power-law cosmological solution derived from DGP brane with a brane tachyon field
Yongli Ping, Lixin Xu, Hongya Liu, Ying Shao
TL;DR
This paper derives a power-law cosmological solution from a DGP brane model with a tachyon field, providing an exact 5D spacetime metric that embeds the 4D Friedmann equation.
Contribution
It introduces a novel embedding of a tachyon field in the DGP brane model with an explicit 5D solution and power-law expansion.
Findings
Power-law expansion on the brane achieved
Exact 5D spacetime metric derived
Embedding of 4D Friedmann equation with tachyon field
Abstract
By studying a tachyon field on the DGP brane model, in order to embed the 4D standard Friedmann equation with a brane tachyon field in 5D bulk, the metric of the 5D spacetime is presented. Then, adopting the inverse square potential of tachyon field, we obtain an expanding universe with power-law on the brane and an exact 5D solution.
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