Scalar cosmological perturbations in M-theory with higher-derivative corrections | Zendy

Kazuho Hiraga | Zendy; Yoshifumi Hyakutake | Zendy

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Scalar cosmological perturbations in M-theory with higher-derivative corrections

Author(s) -

Kazuho Hiraga,

Yoshifumi Hyakutake

Publication year - 2020

Publication title -

progress of theoretical and experimental physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.887

H-Index - 53

ISSN - 2050-3911

DOI - 10.1093/ptep/ptaa142

Subject(s) - physics , curvature , scalar curvature , scalar (mathematics) , mathematical physics , equations of motion , perturbation (astronomy) , spectral density , classical mechanics , cosmological perturbation theory , perturbation theory (quantum mechanics) , inflation (cosmology) , theoretical physics , quantum mechanics , geometry , statistics , mathematics

We investigate the inflationary expansion of the universe induced by higher curvature corrections in M-theory. The inflationary evolution of the geometry is discussed in ref.[1], thus we succeed to analyse metric perturbations around the background. Especially we focus on scalar perturbations and analyse linearized equations of motion for the scalar perturbations. By solving these equations explicitly, we evaluate the power spectrum of the curvature perturbation. Scalar spectrum index is estimated under some assumption, and we show that it becomes close to 1.

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