New Coordinates for de Sitter Space and de Sitter Radiation

Details New Coordinates for de Sitter Space and de Sitter Radiation New Coordinates for de Sitter Space and de Sitter Radiation

2002-04-14

arxiv.org/abs/hep-th/0204107v3

Phys.Lett.B546:189-195,2002

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 10 pages; v2. references added; v3. minor sign errors fixed, reference added, journal version

Scientific paper

10.1016/S0370-2693(02)02701-6

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.

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