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- Title
Boundary effects in local inflation and spectrum of density perturbations.
- Authors
Erol Ertan
- Abstract
Abstract We observe that when a local patch in a radiation filled Robertson–Walker universe inflates by some reason, outside perturbations can enter into the inflating region. Generally, the physical wavelengths of these perturbations become larger than the Hubble radius as they cross into the inflating space and their amplitudes freeze out immediately. It turns out that the corresponding power spectrum is not scale invariant. Although these perturbations cannot reach out to a distance inner observer shielded by a de Sitter horizon, they still indicate a curious boundary effect in local inflationary scenarios.
- Subjects
RADIATION; PRICE inflation; DENSITY; ECOLOGICAL disturbances
- Publication
General Relativity & Gravitation, 2008, Vol 40, Issue 7, p1511
- ISSN
0001-7701
- Publication type
Article
- DOI
10.1007/s10714-007-0544-x