Initial conditions for inflation—A short review
R Brandenberger - International Journal of Modern Physics D, 2017 - World Scientific
I give a brief review of the status of research on the nature of initial conditions required to
obtain a period of cosmological inflation. It is shown that there is good evidence that in the …
obtain a period of cosmological inflation. It is shown that there is good evidence that in the …
Beginning inflation in an inhomogeneous universe
Using numerical solutions of the full Einstein field equations coupled to a scalar inflaton field
in 3+ 1 dimensions, we study the conditions under which a universe that is initially …
in 3+ 1 dimensions, we study the conditions under which a universe that is initially …
Robustness of inflation to inhomogeneous initial conditions
K Clough, EA Lim, BS DiNunno… - … of Cosmology and …, 2017 - iopscience.iop.org
We consider the effects of inhomogeneous initial conditions in both the scalar field profile
and the extrinsic curvature on different inflationary models. In particular, we compare the …
and the extrinsic curvature on different inflationary models. In particular, we compare the …
Cosmological attractors and initial conditions for inflation
Inflationary α-attractor models in supergravity, which provide excellent fits to the latest
observational data, are based on the Poincaré disk hyperbolic geometry. We refine these …
observational data, are based on the Poincaré disk hyperbolic geometry. We refine these …
[HTML][HTML] On the initial singularity and extendibility of flat quasi-de Sitter spacetimes
G Geshnizjani, E Ling, J Quintin - Journal of High Energy Physics, 2023 - Springer
A bstract Inflationary spacetimes have been argued to be past geodesically incomplete in
many situations. However, whether the geodesic incompleteness implies the existence of an …
many situations. However, whether the geodesic incompleteness implies the existence of an …
Assessing the scientific status of inflation after Planck
D Chowdhury, J Martin, C Ringeval, V Vennin - Physical Review D, 2019 - APS
Inflation is considered as the best theory of the early universe by a very large fraction of
cosmologists. However, the validity of a scientific model is not decided by counting the …
cosmologists. However, the validity of a scientific model is not decided by counting the …
Introduction to the Number of e-Folds in Slow-Roll Inflation
A Di Marco, E Orazi, G Pradisi - Universe, 2024 - mdpi.com
In this review, a pedagogical introduction to the concepts of slow-roll inflationary universe
and number of e-folds is provided. In particular, the differences between the basic notion of …
and number of e-folds is provided. In particular, the differences between the basic notion of …
The effects of potential shape on inhomogeneous inflation
JC Aurrekoetxea, K Clough, R Flauger… - Journal of Cosmology …, 2020 - iopscience.iop.org
We study the robustness of single-field inflation against inhomogeneities. We derive a
simple analytic criterion on the shape of the potential for successful inflation in the presence …
simple analytic criterion on the shape of the potential for successful inflation in the presence …
Robustness of inflation to large tensor perturbations
Extending our previous work on the robustness of inflation to perturbations in the scalar field,
we investigate the effects of perturbations in the transverse traceless part of the extrinsic …
we investigate the effects of perturbations in the transverse traceless part of the extrinsic …
Inhomogeneous preinflation across Hubble scales in full general relativity
C Joana, S Clesse - Physical Review D, 2021 - APS
We use the 3+ 1 formalism of numerical relativity to investigate the robustness of Starobinsky
and Higgs inflation to inhomogeneous initial conditions, in the form of either a field gradient …
and Higgs inflation to inhomogeneous initial conditions, in the form of either a field gradient …