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Slow roll inflation in the presence of a dark energy coupling

Brax, P., van de Bruck, C., Hall, L.M.H. and Weller, J.M. (2009) Slow roll inflation in the presence of a dark energy coupling. Physical Review D , 79 (10). Art. No. 103508. ISSN 1550-2368

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In models of coupled dark energy, in which a dark energy scalar field couples to other matter components, it is natural to expect a coupling to the inflaton as well. We explore the consequences of such a coupling in the context of single-field slow-roll inflation. Assuming an exponential potential for the quintessence field we show that the coupling to the inflaton causes the quintessence field to be attracted toward the minimum of the effective potential. If the coupling is large enough, the field is heavy and is located at the minimum. We show how this affects the expansion rate and the slow-roll of the inflaton field, and therefore the primordial perturbations generated during inflation. We further show that the coupling has an important impact on the processes of reheating and preheating.

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 The American Physical Society. This is an author produced version of a paper published in 'Physical Review D'. Uploaded in accordance with the publisher's self-archiving policy.
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield)
Depositing User: Mrs Megan Hobbs
Date Deposited: 24 Mar 2010 16:23
Last Modified: 17 Nov 2015 09:47
Published Version: http://dx.doi.org/10.1103/PhysRevD.79.103508
Status: Published
Publisher: Americal Physical Society
Identification Number: 10.1103/PhysRevD.79.103508
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/10572

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