Asymptotic Symmetries and Charges in De Sitter Space

Details Asymptotic Symmetries and Charges in De Sitter Space Asymptotic Symmetries and Charges in De Sitter Space

2010-09-23

arxiv.org/abs/1009.4730v1

Class.Quant.Grav.28:175019,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages, 1 figure

Scientific paper

10.1088/0264-9381/28/17/175019

The asymptotic symmetry group (ASG) at future null infinity (I^+) of four-dimensional de Sitter spacetimes is defined and shown to be given by the group of three-dimensional diffeomorphisms acting on I^+. Finite charges are constructed for each choice of ASG generator together with a two-surface on I^+. A conservation equation is derived relating the evolution of the charges with the radiation flux through I^+.

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