Using Energy Conditions to Distinguish Brane Models and Study Brane Matter

Details Using Energy Conditions to Distinguish Brane Models and Study Brane Matter Using Energy Conditions to Distinguish Brane Models and Study Brane Matter

2007-12-20

arxiv.org/abs/0712.3397v2

Commun.Theor.Phys.50:383-386,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5pages, no figures; Accepted by Communications in Theoretical Physics

Scientific paper

10.1088/0253-6102/50/2/21

Current universe (assumed here to be normal matter on the brane) is pressureless from observations. In this case the energy condition is $\rho_0\geq0$ and $p_0=0$. By using this condition, brane models can be distinguished. Then, assuming arbitrary component of matter in DGP model, we use four known energy conditions to study the matter on the brane. If there is nonnormal matter or energy (for example dark energy with $w<-1/3$) on the brane, the universe is accelerated.

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