On the Problem of Initial Conditions for Inflation

  title={On the Problem of Initial Conditions for Inflation},
  author={Andrei Linde},
  journal={Foundations of Physics},
  • Andrei Linde
  • Published 11 October 2017
  • Economics
  • Foundations of Physics
I review the present status of the problem of initial conditions for inflation and describe several ways to solve this problem for many popular inflationary models, including the recent generation of the models with plateau potentials favored by cosmological observations. 

A plausible solution to the problem of initial conditions for inflation

We propose yet another solution to the initial condition problem of inflation associated with homogeneity beyond the horizon at the onset of inflation, in cases where inflation is preceded by a

Initial conditions for plateau inflation: a case study

We study initial conditions for inflation in scenarios where the inflaton potential has a plateau shape. Such models are those most favored by Planck data and can be obtained in a large number of

Initial conditions for inflation in an FRW universe

We examine the class of initial conditions which give rise to inflation. Our analysis is carried out for several popular models including: Higgs inflation, Starobinsky inflation, chaotic inflation,

Theoretical cosmology

We review current theoretical cosmology, including fundamental and mathematical cosmology and physical cosmology (as well as cosmology in the quantum realm), with an emphasis on open questions.

Effective field theories as a novel probe of fine-tuning of cosmic inflation

  • Feraz Azhar
  • Economics
    Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics
  • 2020

Initial conditions of inflation in a Bianchi I Universe

We investigate the initial conditions of inflation in a Bianchi~I universe that is homogeneous but not isotropic. We use the Eisenhart lift to describe such a theory geometrically as geodesics on a

Inflation and cosmological constant

In construction of an inflationary model, one usually assumes that the matter sector of the gravitational action is minimally coupled to the background. It means that the matter (inflaton) part of

T -model inflation and bouncing cosmology

We examine the dynamics of a closed cosmology of which the matter source is that of a conformally coupled scalar field with a broken $\mathrm{SO}(1,1)$ symmetry, which corresponds to the

Field theory capable of guaranteeing the initial conditions needed for inflation

Inflatonary model of a single scalar field with primordial potential V ( φ ) = 12 m 2 φ 2 + λ 4 φ 4 ( m 2 > 0) non-minimally coupled to gravity is studied in two-measures theory (TMT) in the Palatini



Global structure of the inflationary universe

I describe the quantum creation of black holes in de Sitter space. A single topology change can lead to the formation of multiple black holes and the eventual disconnection of large spacelike

Inflation and string cosmology

I give a brief review of inflationary theory and of its recent progress related to string cosmology.

Inflationary Cosmology after Planck 2013

I give a general review of inflationary cosmology and of its present status, in view of the 2013 data release by the Planck satellite. A specific emphasis is given to the new broad class of theories,

Chaotic inflation with constrained fields

Cosmological attractors and asymptotic freedom of the inflaton field

We show that the inflaton coupling to all other fields is exponentially suppressed during inflation in the cosmological α-attractor models. In the context of supergravity, this feature is a

Planck, LHC, and $\alpha$-attractors

We describe a simple class of cosmological models called $\alpha$ attractors, which provide an excellent fit to the latest Planck data. These theories are most naturally formulated in the context of