Evolution of superhorizon perturbations in early Universe with anisotropic solid remnant

Abstract

We study effects of presence of a small amount of so-called anisotropic solid remnant in the early post-inflationary Universe dominated by radiation. This model is inspired by solid inflation and its generalizations with matter described through a triplet of fields. In our model, the internal full global Euclidean symmetry of this triplet is broken, which leads to an anisotropic expansion of the Universe. Superhorizon scalar and vector perturbations grow, while behavior of tensor perturbations remains the same as in the standard case with Universe filled with only radiation. We also find a very interesting case within the limit of a very small amount of the anisotropic solid remnant and the longest possible duration of its presence, where size of vector perturbations decreases with a different power of scale factor as in the standard scenario. The obtained results improve agreement between the observational data and the theoretical predictions of solid inflation in a case with suppressed non-linear effects.

22 pages, 1 figure

References in corpus (28)

• A Joint Analysis of BICEP2/Keck Array and Planck Data
• Measurements of the Hubble Constant: Tensions in Perspective
• The Expansion of the Universe is Faster than Expected
• Improved limits on the tensor-to-scalar ratio using BICEP and Planck
• Gravitational Wave Production At The End Of Inflation
• Theory of cosmological perturbations in an anisotropic universe
• Inflationary perturbations in anisotropic backgrounds and their imprint on the CMB
• A Challenge to the Standard Cosmological Model
• Inflaton Fragmentation and Oscillon Formation in Three Dimensions
• Constraints on a Bianchi type I spacetime extension of the standard $\Lambda$CDM model
• Bianchi Model CMB Polarization and its Implications for CMB Anomalies
• Recent developments in warm inflation
• Cosmological perturbations from vector inflation
• Non-detection of a statistically anisotropic power spectrum in large-scale structure
• Vector Perturbations in a Contracting Universe
• Creating Statistically Anisotropic and Inhomogeneous Perturbations
• Bianchi I meets the Hubble diagram
• Inflationary power asymmetry from primordial domain walls
• Inflaton fragmentation: Emergence of pseudo-stable inflaton lumps (oscillons) after inflation
• Constraints on an Anisotropic Universe
• Testing anisotropic Hubble expansion
• Large scale vector modes and the first CMB temperature multipoles
• Warm inflation with non-comoving scalar field and radiation fluid
• Constraints on Bianchi-I type universe with SH0ES anchored Pantheon+ SNIa data
• Bubble nucleation and inflationary perturbations
• Constraining primordial vector mode from B-mode polarization
• Evolution of perturbations in a universe with exotic solid-like matter
• Hint of $r\simeq 0.01$ after DESI DR2 ?