Abstract
We consider cosmological dynamics of a canonical bulk scalar field, which is coupled non-minimally to 5-dimensional Ricci scalar in a DGP setup. We show that presence of this non-minimally coupled bulk scalar field affects the jump conditions of the original DGP model significantly. Within a superpotential approach, we perform some numerical analysis of the model parameter space and consider bulk-brane energy exchange in this setup. Also we show that the normal, ghost-free branch of the DGP solutions in this case has the potential to realize a self-consistent phantom-like behavior and therefore explains late time acceleration of the universe in a consistent way.
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Acknowledgements
This work has been supported financially by the Research Council of the Islamic Azad University, Sari Branch, Sari, Iran.
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Nozari, K., Rashidi, N. Cosmological dynamics of a non-minimally coupled bulk scalar field in DGP setup. Astrophys Space Sci 347, 375–388 (2013). https://doi.org/10.1007/s10509-013-1513-3
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DOI: https://doi.org/10.1007/s10509-013-1513-3