On the initial conditions for inflation with plateau potentials: the R plus R-2 (super)gravity case

• Autoři: DALIANIS Ioannis; FARAKOS Fotis
• Rok publikování: 2015
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• www: Journal website
• Obor: Teoretická fyzika
• Klíčová slova: HIGHER-DERIVATIVE SUPERGRAVITY; MINIMAL SUPERGRAVITY; AUXILIARY FIELDS; MODELS; UNIVERSE; MATTER; PARADIGM
• Popis: 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.

Související projekty

• Ústav Eduarda Čecha pro algebru, geometrii a matematickou fyziku