Fresh inflation from five-dimensional vacuum state

I study fresh inflation from a five-dimensional vacuum state, where the fifth dimension is constant. In this framework, the universe can be seen as inflating in a four-dimensional FRW metric embedding in a five-dimensional metric. Finally, the experimental data $n_s=1$ are consistent with $(p+ρ_t)/ρ_t \simeq1/3$ in the fresh inflationary scenario.

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