https://doi.org/10.1140/epjc/s10052-020-8176-3
Regular Article - Theoretical Physics
Generalization of cosmological attractor approach to Einstein–Gauss–Bonnet gravity
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskie Gory 1, 119991, Moscow, Russia
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Received:
26
May
2020
Accepted:
21
June
2020
Published online:
8
July
2020
Abstract
We construct models with the Gauss–Bonnet term multiplied by a function of the scalar field leading to an inflationary scenario. The consideration is related to the slow-roll approximation. The cosmological attractor approach gives the spectral index of scalar perturbations which is in a good agreement with modern observation and allows for variability of the tensor-to-scalar ratio. We reconstruct models with variability of parameters, which allows one to reproduce cosmological attractor predictions for inflationary parameters in an approximation of the leading order of 1/N in Einstein–Gauss–Bonnet gravity.
© The Author(s), 2020
