Large field inflation and double α-attractors

By R. Kallosh, Andrei Linde, D. Roest. 2014

189 citations recorded by the source corpus.

A bstractWe consider a broad class of inflationary models that arise naturally in super-gravity. They are defined in terms of a parameter α that determines the curvature and cutoff of these models. As a function of this parameter, we exhibit that the inflationary predictions generically interpolate between two attractor points. At small cutoff α, the resulting inflationary model is of plateau-type with ns = 1 − 2/N and r = 12α/N2. For α = 1, these predictions coincide with predictions of the Starobinsky model and Higgs inflation. In contrast, for large cutoff α, the theory asymptotes to quadratic inflation, with ns = 1 − 2/N, r = 8/N. Both universal predictions can be attributed to a stretching of the moduli space. For intermediate values of α, the predictions interpolate between these two critical points, thus covering the sweet spots of both Planck and BICEP2.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/c8100abe6fe69f941cdf7f04d6f0ec1dce3cbdc7

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

In Statistical and Nonlinear Physics

Citations in the corpus

Cosmology with nilpotent superfields (2014, methodology): “In all our supergravity models in [1–9], there is one light scalar, the inflaton.”
Escher in the Sky (2015, methodology): “and show that for a very broad choice of the functions f(Z) this theory has the same observational predictions [36, 38].”
Cosmological attractors and initial conditions for inflation (2015, methodology): “In this paper we described some simple versions of the theory of the cosmological attractor models [1, 4, 5, 15, 17].”
Primordial black holes from α-attractors (2018, background): “Note that the Kähler metric on the S = 0 scalar submanifold corresponds to a Σ = SU(1, 1)/U(1) coset symmetric space of constant curvature RΣ = −2/3α and therefore, one may recognize α as the square of the “radius” of Σ [45, 52, 53].”