New coordinates for de Sitter space and de Sitter radiation

We introduce a simple coordinate system covering half of de Sitter space. The new coordinates have several attractive properties: the time direction is a Killing vector, the metric is smooth at the horizon, and constant-time slices are just flat Euclidean space. We demonstrate the usefulness of the...

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Bibliographic Details
Published in:Physics letters. B 2002-10, Vol.546 (3-4), p.189-195
Main Author: Parikh, Maulik K
Format: Article
Language:English
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Summary:We introduce a simple coordinate system covering half of de Sitter space. The new coordinates have several attractive properties: the time direction is a Killing vector, the metric is smooth at the horizon, and constant-time slices are just flat Euclidean space. We demonstrate the usefulness of the coordinates by calculating the rate at which particles tunnel across the horizon. When self-gravitation is taken into account, the resulting tunneling rate is only approximately thermal. The effective temperature decreases through the emission of radiation.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(02)02701-6