Transition of equation of state of effective dark energy in the Dvali-Gabadadze-Porrati model with bulk contents
- Department of Physics, Fudan University, 200433 Shanghai (China)
- Instituto de Fisica, Universidade de Sao Paulo, C.P. 66.318, CEP 05315-970, Sao Paulo (Brazil)
- Department of Physics, National Dong Hwa University, Shoufeng, 974 Hualien (China)
We investigate the effect of the bulk contents in the Dvali-Gabadadze-Porrati (DGP) braneworld on the evolution of the universe. We find that, although the pure DGP model cannot accommodate the transition of the effective equation of state of dark energy, once the bulk matter T{sub 5}{sup 5} is considered, the modified model can realize the w{sub eff} crossing -1. However, this transition of the equation of state cannot be realized by just considering bulk-brane energy exchange or the Gauss-Bonnet effect while the bulk matter contribution is not included. T{sub 5}{sup 5} plays the major role in the modified DGP model to have the w{sub eff} crossing -1 behavior. We show that our model can describe the superacceleration of our universe with the equation of state of the effective dark energy and the Hubble parameter in agreement with observations.
- OSTI ID:
- 21024051
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 76, Issue 12; Other Information: DOI: 10.1103/PhysRevD.76.124026; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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