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Holographic Discreteness of Inflationary Perturbations | | Craig J. Hogan
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3 Dec 2001 | | Journal: | Phys.Rev. D66 (2002) 023521 | | Subject: | astro-ph gr-qc hep-th | | Affiliation: | U. Washington | | Abstract: | The holographic entropy bound is used to estimate the quantum-gravitational discreteness of inflationary perturbations. In the context of scalar inflaton perturbations produced during standard slow-roll inflation, but assuming that horizon-scale perturbations ``freeze out’’ in discrete steps separated by one bit of total observable entropy, it is shown that the Hilbert space of a typical horizon-scale inflaton perturbation is equivalent to that of about 10^5 binary spins-- approximately the inverse of the final scalar metric perturbation amplitude, independent of other parameters. Holography thus suggests that in a broad class of fundamental theories, inflationary perturbations carry a limited amount of information (about 10^5 bits per mode) and should therefore display discreteness not predicted by the standard field theory. Some manifestations of this discreteness may be observable in cosmic background anisotropy. | | Source: | arXiv, astro-ph/0201020 | | Services: | Forum | Review | PDF | Favorites | |
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