On the problem of initial conditions for inflation

Abstract

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.

18 pages, 6 figures, minor corrections

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• Beyond the Poles in Attractor Models of Inflation
• Starting inflation from inhomogeneous initial conditions with momentum
• Quantum gravitational onset of Starobinsky inflation in a closed universe
• Gravitational dynamics in Higgs inflation: Preinflation and preheating with an auxiliary field
• T-Model Inflation and Bouncing Cosmology
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• Supergravity, $\alpha$-attractors and primordial non-Gaussianity
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• A solution to the initial condition problems of inflation : NATON
• Flows into de Sitter space from anisotropic initial conditions: An effective field theory approach
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• Summing over Non-singular Paths in Quantum Cosmology
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• Inflation and Cosmological Constant
• The Two-Measure Theory and an Overview of Some of its Manifestations
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• Accelerating Universe in Terms of Hankel Function Index
• Large Field Polynomial Inflation in Palatini $f(R,\varphi )$ Gravity
• Inflation and Dark Matter from The Low Entropy Hypothesis and Modeling Mechanism of Modified Gravity
• Mori-Zwanzig formalism for early cosmic inflation
• The Universe Originating from an Empty Planck-Size Torus