Absorption cross section in de Sitter space

Abstract

We study the wave equation for a minimally coupled massive scalar in three-dimensional de Sitter space. We compute the absorption cross section to investigate its cosmological horizon in the southern diamond. Although the absorption cross section is not defined exactly, we can be determined it from the fact that the low-energy $s(j=0)$-wave absorption cross section for a massless scalar is given by the area of the cosmological horizon. On the other hand, the low-temperature limit of $j\ne 0$-mode absorption cross section is useful for extracting information surrounding the cosmological horizon. Finally we mention a computation of the absorption cross section on the CFT-side using the dS/CFT correspondence.

13 pages, version to appear in MPLA

References in corpus (12)

• Black Hole Thermodynamics and Negative Entropy in deSitter and Anti-deSitter Einstein-Gauss-Bonnet gravity
• Mass, Entropy and Holography in Asymptotically de Sitter Spaces
• Conformal Vacua and Entropy in de Sitter Space
• Cardy-Verlinde Formula and Thermodynamics of Black Holes in de Sitter Spaces
• Cardy-Verlinde Formula and Asymptotically de Sitter Spaces
• Vacuum States and the S-Matrix in dS/CFT
• Support of dS/CFT correspondence from perturbations of three dimensional spacetime
• dS/CFT correspondence on a brane
• The Asymptotic Dynamics of de Sitter Gravity in three Dimensions
• Miracles and complementarity in de Sitter space
• Dynamic dS/CFT correspondence using the brane cosmology
• Scattering amplitudes and thermal temperatures of the Schwarzschild-de Sitter black holes

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• Greybody factors and quasinormal modes for a nonminimally coupled scalar field in a cloud of strings in (2+1)-dimensional background
• Stability under scalar perturbations and quasinormal modes of 4D Einstein-Born-Infeld dilaton spacetime: Exact spectrum
• Greybody factors for a minimally coupled scalar field in three-dimensional Einstein-power-Maxwell black hole background
• Greybody factors for a nonminimally coupled scalar field in BTZ black hole background
• dS-Holographic C-Functions with a Topological, Dilatonic Twist
• Greybody factors for a minimally coupled massless scalar field in Einstein-Born-Infeld dilaton spacetime
• Difference between AdS and dS spaces: wave equation approach
• Dynamical Behavior of dilaton in de Sitter space
• Asymptotically Flat Holography and Strings on the Horizon
• Dilatonic tachyon in Kerr-de Sitter space