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Abstract: In this paper we study the generation of primordial perturbation with amodified dispersion relation in various cosmological evolutions. We stress thatthe formation of the power spectrum is strongly dependent on the background.Working in a bounce model with a matter-like contracting phase, we obtain a redtilt spectrum due to the modified dispersion relation.



Autor: Yi-Fu Cai, Xinmin Zhang

Fuente: https://arxiv.org/







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