TY  - JOUR
AU  - Domcke, V.
AU  - Ema, Y.
AU  - Sandner, S.
PY  - 2024
DA  - 2024//
TI  - Perturbatively including inhomogeneities in axion inflation
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 019
EP  - 24pp
VL  - 03
IS  - 3
PB  - IOP Publishing Ltd
KW  - axions
KW  - inflation
KW  - particle physics- cosmology connection
AB  - Axion inflation, i.e. an axion-like inflaton coupled to an Abelian gauge field through a Chern-Simons interaction, comes with a rich and testable phenomenology. This is particularly true in the strong backreaction regime, where the gauge field production heavily impacts the axion dynamics. Lattice simulations have recently demonstrated the importance of accounting for inhomogeneities of the axion field in this regime. We propose a perturbative scheme to account for these inhomogeneities while maintaining high computational efficiency. Our goal is to accurately capture deviations from the homogeneous axion field approximation within the perturbative regime as well as self -consistently determine the onset of the nonperturbative regime.
SN  - 1475-7516
UR  - https://arxiv.org/abs/2310.09186
UR  - https://doi.org/10.1088/1475-7516/2024/03/019
DO  - 10.1088/1475-7516/2024/03/019
LA  - English
N1  - WOS:001185016600002
ID  - Domcke_etal2024
ER  -