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a-attractors in quintessential inflation motivated by supergravity

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PhysRevD.103.123535.pdf (709,0Kb)
 
10.1103/PhysRevD.103.123535
 
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hdl:2117/352204

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Aresté Saló, Llibert
Benistry, David
Guendelman, Eduardo I.
Haro Cases, JaumeMés informacióMés informacióMés informació
Document typeArticle
Defense date2021-06-15
PublisherAmerican Physical Society
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
ProjectECUACIONES EN DERIVADAS PARCIALES: PROBLEMAS DE REACCION-DIFUSION, INTEGRO-DIFERENCIALES Y GEOMETRICOS (AEI-MTM2017-84214-C2-1-P)
Abstract
An exponential kind of quintessential inflation potential motivated by supergravity is studied. This type belongs to the class of a-attractor models. The model was studied for the first time by Dimopoulos and Owen in [J. Cosmol. Astropart. Phys. 06 (2017) 027], in which the authors introduced a negative cosmological constant in order to ensure a zero-vacuum energy density at late times. However, in this paper, we disregard this cosmological constant, showing that the obtained results are very close to the ones obtained recently in the context of Lorentzian quintessential inflation and thus depicting with great accuracy the early- and late-time acceleration of our Universe. The model is compatible with the recent observations. Finally, we review the treatment of the a-attractor and we show that our potential depicts the late time cosmic acceleration with an effective equation of state equal to -1
CitationAresté, L. [et al.]. a-attractors in quintessential inflation motivated by supergravity. "Physical Review D", 15 Juny 2021, vol. 103, núm. 12, art. 123535. 
URIhttp://hdl.handle.net/2117/352204
DOI10.1103/PhysRevD.103.123535
ISSN2470-0029
Publisher versionhttps://journals.aps.org/prd/abstract/10.1103/PhysRevD.103.123535
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