Abstract
Abstract
We study gauge preheating following pseudoscalar-driven inflation in full general
relativity. We implement the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) scheme to solve the full
nonlinear evolution of the metric alongside the dynamics of the pseudoscalar and gauge fields. The
dynamics of the background and emission of gravitational waves are broadly consistent with
simulations in a Friedmann-Lemaître-Robertson-Walker (FLRW) spacetime. We find large,
localized overdensities in the BSSN simulations of order δ = δρ/ρ ∼ 30, and
the dimensionless power spectrum of δ peaks above unity. These overdense regions are seeded
on length scales only slightly smaller than the horizon, and have a compactness C ∼ 0.1. The
scale of peak compactness is shorter than the Jeans length, which implies that pressure of the
matter fields plays an important role in the evolution of these objects.
Cited by
4 articles.
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1. Kinetic preheating after α-attractor inflation;Physics Letters B;2024-09
2. Present and future of
C
osmo
L
attice;Reports on Progress in Physics;2024-08-05
3. Photon propagator for inflation in the general covariant gauge;Journal of High Energy Physics;2024-07-11
4. The role of vectors in reheating;Journal of Cosmology and Astroparticle Physics;2024-06-01