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QCD Ghost Dark Energy in RS II Braneworld with Bulk-Brane Interaction

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Abstract

We investigate the QCD ghost model of dark energy in the framework of RS II braneworld. We assume there is an energy flow between the brane and bulk, and hence the continuity equation for the ghost dark energy is violated, while it is still preserved for the dark matter on the brane. We find that with the brane-bulk interaction, the equation of state parameter of ghost dark energy on the brane, can cross the phantom line w D =−1 at the present time, which confirms by some cosmological evidences. This result is in contrast to the standard cosmology where w D of ghost dark energy never cross the phantom line and the universe enters a de Sitter phase at the late time.

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Acknowledgements

We thank the referees for valuable comments which helped us to improve the paper significantly. This work has been supported financially by Islamic Azad University, Fasa Branch, Fasa, Iran.

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  1. Department of Sciences, Fasa Branch, Islamic Azad University, Fasa, Iran

    Leila Yousefi & Ahmad Sheykhi

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  1. Leila Yousefi
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  2. Ahmad Sheykhi
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Correspondence to Ahmad Sheykhi.

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Yousefi, L., Sheykhi, A. QCD Ghost Dark Energy in RS II Braneworld with Bulk-Brane Interaction. Int J Theor Phys 53, 1472–1482 (2014). https://doi.org/10.1007/s10773-013-1947-y

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