Bare and effective fluid description in brane world cosmology

Norman Cruz, Samuel Lepe, Francisco Peña, Joel Saavedra

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


An effective fluid description, for a brane world model in five dimensions, is discussed for both signs of the brane tension. We found several cosmological scenarios where the effective equation differs widely from the bare equation of state. For universes with negative brane tension, with a bare fluid satisfying the strong energy condition, the effective fluid can cross the barrier ωeff =-1.

Original languageEnglish
Pages (from-to)289-293
Number of pages5
JournalEuropean Physical Journal C
Issue number1
StatePublished - Mar 2010


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