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Cosmological influence of super-Hubble perturbations

Edward W. Kolb·Sabino Matarrese·Alessio Notari·Antonio Riotto
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Abstract

The existence of cosmological perturbations of wavelength larger than the Hubble radius is a generic prediction of the inflationary paradigm. We provide the derivation beyond perturbation theory of a conserved quantity which generalizes the linear comoving curvature perturbation. As a by-product, we show that super-Hubble-radius (super-Hubble) perturbations have no physical influence on local observables e.g., the local expansion rate) if cosmological perturbations are of the adiabatic type.

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Edward W. Kolb, Sabino Matarrese, Alessio Notari, Antonio Riotto. 2005-09-10. Cosmological influence of super-Hubble perturbations. https://doi.org/10.1142/s0217732305018682

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