DALIANIS, Ioannis and Fotis FARAKOS. On the initial conditions for inflation with plateau potentials: the R plus R-2 (super)gravity case. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. 2015, vol. 2015, No 7, p. "nestránkováno", 29 pp. ISSN 1475-7516.
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Basic information
Original name On the initial conditions for inflation with plateau potentials: the R plus R-2 (super)gravity case
Authors DALIANIS, Ioannis (300 Greece) and Fotis FARAKOS (300 Greece, guarantor, belonging to the institution).
Edition JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2015, 1475-7516.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10301 Atomic, molecular and chemical physics
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
WWW Journal website
Impact factor Impact factor: 5.634
RIV identification code RIV/00216224:14310/15:00081049
Organization unit Faculty of Science
UT WoS 000359259500044
Keywords in English HIGHER-DERIVATIVE SUPERGRAVITY; MINIMAL SUPERGRAVITY; AUXILIARY FIELDS; MODELS; UNIVERSE; MATTER; PARADIGM
Tags AKR, rivok
Changed by Changed by: Ing. Andrea Mikešková, učo 137293. Changed: 7/4/2016 15:08.
Abstract
We discuss the initial conditions problem for inflation driven by the vacuum energy of a plateau potential, and in particular the Starobinsky inflation. We show that the supergravity embedding of the R+R2 theory naturally decreases the size of the acausal homogeneity, required for the low-scale inflation to occur, thanks to the presence of the dynamical pure supergravitational ``auxiliary'' fields. We examine the evolution of the R+R2 fields within a FLRW Universe. We also find a dependence of the initial conditions problem on the background spatial curvature.
Links
GBP201/12/G028, research and development projectName: Ústav Eduarda Čecha pro algebru, geometrii a matematickou fyziku
Investor: Czech Science Foundation
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