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Title of Journal: J High Energ Phys

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Abbravation: Journal of High Energy Physics

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Springer Berlin Heidelberg

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DOI

10.1016/0022-0728(91)85486-9

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1029-8479

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Cosmological consequences of initial state entangl

Authors: Andreas Albrecht Nadia Bolis R Holman
Publish Date: 2014/11/19
Volume: 2014, Issue: 11, Pages: 93-
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Abstract

We explore the cosmological consequences of having the fluctuations of the inflaton field entangled with those of another scalar within the context of a toy model consisting of noninteracting minimally coupled scalars in a fixed de Sitter background We find that despite the lack of interactions in the Lagrangian the initial state entanglement modifies the mode equation for the inflaton fluctuations and thus can induce changes in cosmological observables These effects are examined for a variety of choices of masses and we find that they can be consistent with the requirement that the back reaction of the modified state not affect the inflationary phase while still giving rise to observable effects in the power spectrum Our results suggest that more realistic extensions of the ideas explored here beyond the simple toy model may lead to interesting observable effectsThis article is published under an open access license Please check the Copyright Information section for details of this license and what reuse is permitted If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and reuse information please contact the Rights and Permissions team

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