Non-minimal Inflationary Attractors

By R. Kallosh, Andrei Linde. Journal of Cosmology and Astroparticle Physics, 2013

235 citations recorded by the source corpus.

Recently we identified a new class of (super)conformally invariant theories which allow inflation even if the scalar potential is very steep in terms of the original conformal variables. Observational predictions of a broad class of such theories are nearly model-independent. In this paper we consider generalized versions of these models where the inflaton has a non-minimal coupling to gravity with a negative parameter ξ different from its conformal value -1/6. We show that these models exhibit attractor behavior. With even a slight increase of |ξ| from |ξ| = 0, predictions of these models for ns and r rapidly converge to their universal model-independent values corresponding to conformal coupling ξ = −1/6. These values of ns and r practically coincide with the corresponding values in the limit ξ → −∞.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Oceanography

View Paper: https://www.semanticscholar.org/paper/74ea75f0acedea068e3ae979509b89eb720d6e6e

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Citations in the corpus

Multi-field conformal cosmological attractors (2013, methodology): “Our approach can be easily extended to multi-field models with a general negative non-conformal coupling to gravity ξ < 0 [22].”
Superconformal inflationary α-attractors (2013, methodology): “These models were generalized in [8] to the models with arbitrary negative nonminimal coupling to gravity ξ 2 φ(2)R, ξ < 0.”
Inflationary Cosmology after Planck 2013 (2014, background): “In all of these cases, as well as in some other models discussed in [136], we observe attractor behavior, with an attractor point (13.”
Universality classes of inflation (2013, methodology): “In fact we will analyse a generalisation thereof that was recently proposed in the context of non-minimally coupled models [5] with”