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Adiabatic perturbations in pre big bang models matching conditions and scale invariance

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Published in Physical Review. D. 2002, vol. 66, no. 083503
Abstract At low energy, the four-dimensional effective action of the ekpyrotic model of the universe is equivalent to a slightly modified version of the pre big bang model. We discuss cosmological perturbations in these models. In particular we address the issue of matching the perturbations from a collapsing to an expanding phase in full generality. We show that, generically, one obtains
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DURRER, Ruth, VERNIZZI, Filippo. Adiabatic perturbations in pre big bang models matching conditions and scale invariance. In: Physical Review. D, 2002, vol. 66, n° 083503. https://archive-ouverte.unige.ch/unige:962

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Deposited on : 2009-02-26

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