Braneworld cosmology in the sourced-Taub background

Abstract

A new braneworld in the sourced-Taub background is proposed. The gravity field equations in the internal source region and external vacuum region are investigated, respectively. We find that the equation of state for the effective dark energy of a dust brane in the source region can cross the phantom divide $w=-1$. Furthermore, there is a drop on $H(z)$ diagram, which presents a possible mechanism for the recent direct data of $H(z)$.

10 pages, 3 figures, v2: a section to review the previous results on the source of Taub space added, PLB in press

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Cited by in corpus (5)

• A Completely Regular Quantum Stress Tensor with $w<-1$
• A more general interacting model of holographic dark energy
• Schwarzschild solution as a result of thermodynamics
• New mechanism to cross the phantom divide
• Brane tachyon dynamics