### Impacto

### Downloads

Downloads per month over past year

Ruíz Ruíz, Fernando and Redmount, Ian H.
(1989)
*Thermal equilibrium in de Sitter space.*
Physical Review D, 39
(8).
pp. 2289-2296.
ISSN 0556-2821

Preview |
PDF
402kB |

Official URL: http://dx.doi.org/10.1103/PhysRevD.39.2289

## Abstract

Thermal-equilibrium quantum states are constructed for free scalar fields in (%+1)-dimensional de Sitter space. The states are described by density matrices of "thermal" form, satisfying the von Neumann equation associated with the appropriate functional Schrodinger equation. These solutions exist only for fields with mass and/or curvature coupling corresponding to conformal invariance. The temperature associated with such a state obeys the classical red-shift law. States exist with any temperature value at any given time; the zero-temperature limit is the Euclidean vacuum state. The total field energy of a thermal state above that of the Euclidean vacuum is finite and positive. This excitation energy consists of one contribution which red-shifts classically, but-it can also contain a contribution which grows in time as the radius of the space.

Item Type: | Article |
---|---|

Additional Information: | © 1989 The American Physical Society. |

Uncontrolled Keywords: | Astronomy & Astrophysics, Physics, Particles & Fields |

Subjects: | Sciences > Physics |

ID Code: | 25491 |

Deposited On: | 20 May 2014 16:57 |

Last Modified: | 20 May 2014 16:57 |

### Origin of downloads

Repository Staff Only: item control page