No absorption in de Sitter space

Abstract

We study the wave equation for a minimally coupled massive scalar in D-dimensional de Sitter space. We compute the absorption cross section to investigate its cosmological horizon in the southern diamond. By analogy of the quantum mechanics, it is found that there is no absorption in de Sitter space. This means that de Sitter space is usually in thermal equilibrium, like the black hole in anti de Sitter space. It confirms that the cosmological horizon not only emits radiation but also absorbs that previously emitted by itself at the same rate, keeping the curvature radius of de Sitter space fixed.

11 pages, REVTEX

References in corpus (8)

• The dS/CFT Correspondence
• String Theory and Quintessence
• The Acceleration of the Universe, a Challenge for String Theory
• Conformal anomaly from dS/CFT correspondence
• Action, Mass and Entropy of Schwarzschild-de Sitter black holes and the de Sitter/CFT Correspondence
• Entropy of the three dimensional Schwarzschild-de Sitter black hole
• De Sitter space versus Nariai Black Hole: stability in d5 higher derivative gravity
• Dynamical Behavior of dilaton in de Sitter space

Cited by in corpus (8)

• Quasinormal modes of D-dimensional de Sitter spacetime
• Greybody factors for non-minimally coupled scalar fields in Schwarzschild-de Sitter spacetime
• Absorption and quasinormal modes of classical fields propagating on 3D and 4D de Sitter spacetime
• Solution of Dirac equation and greybody radiation around a regular Bardeen black hole surrounded by quintessence
• Acoustic black hole in Schwarzschild spacetime: quasi-normal modes, analogous Hawking radiation and shadows
• Greybody factor of scalar field from Reissner-Nordstrom-de Sitter black hole
• Greybody factor of scalar fields from black strings
• Greybody factor and perturbation of a Schwarzschild black hole with string clouds and quintessence