Year: 2003
Type: article
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 the property of the cosmological horizon in the southern diamond of de Sitter space. It is found that there is no absorption of radiation by the cosmological horizon of de Sitter space at the classical level. This means that the de Sitter space is usually in thermal equilibrium with the external scalar perturbation. It confirms that the cosmological horizon not only absorbs radiation of the scalar but also emits that previously absorbed by itself at the same rate, keeping the curvature radius of de Sitter space fixed. Finally, we discuss the dS/CFT correspondence in the context of the wave equation approach.
Source: Classical and Quantum Gravity
Authors: Y S Myung, H W Lee
Institution: Inje University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1972981807