### Abstract

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.

Original language | English (US) |
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Pages (from-to) | 189-195 |

Number of pages | 7 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 546 |

Issue number | 3-4 |

DOIs | |

State | Published - Oct 24 2002 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

**New coordinates for de Sitter space and de Sitter radiation.** / Parikh, Maulik.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - New coordinates for de Sitter space and de Sitter radiation

AU - Parikh, Maulik

PY - 2002/10/24

Y1 - 2002/10/24

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0012813597&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0012813597&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(02)02701-6

DO - 10.1016/S0370-2693(02)02701-6

M3 - Article

AN - SCOPUS:0012813597

VL - 546

SP - 189

EP - 195

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 3-4

ER -