Constraints on the Sharpness of the Curvature Power Spectrum

Document detail

ID

oai:arXiv.org:2410.07086

Topic

Astrophysics - Cosmology and Nonga... General Relativity and Quantum Cos... High Energy Physics - Phenomenolog...

Author

Inomata, Keisuke Luo, Xuheng

Year

2024

listing date

10/16/2024

Keywords

constraints spectrum

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Abstract

Motivated by the fact that a sharply peaked curvature spectrum is often considered in the literature, we examine theoretical constraints on the sharpness of such a spectrum.

In particular, we show that the sharply peaked curvature power spectrum, originating from the enhancement of subhorizon perturbations during inflation, is significantly constrained by energy conservation.

While the constraints do not depend on the exact form of inflaton potential, we also study concrete inflaton potentials that realize a sharply peaked curvature spectrum and how theoretical limits are saturated in these cases.

;Comment: 10 pages, 3 figures

Inomata, Keisuke,Luo, Xuheng, 2024, Constraints on the Sharpness of the Curvature Power Spectrum

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