Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2006-06-28
Class.Quant.Grav.24:1385-1404,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
V2: Some presentation changes; a new section introduced, with a discussion about possible phenomenological consequences; new r
Scientific paper
10.1088/0264-9381/24/6/002
A special relativity based on the de Sitter group is introduced, which is the theory that might hold up in the presence of a non-vanishing cosmological constant. Like ordinary special relativity, it retains the quotient character of spacetime, and a notion of homogeneity. As a consequence, the underlying spacetime will be a de Sitter spacetime, whose associated kinematics will differ from that of ordinary special relativity. The corresponding modified notions of energy and momentum are obtained, and the exact relationship between them, which is invariant under a re-scaling of the involved quantities, explicitly exhibited. Since the de Sitter group can be considered a particular deformation of the Poincar\'e group, this theory turns out to be a specific kind of deformed (or doubly) special relativity. Some experimental consequences, as well as the causal structure of spacetime--modified by the presence of the de Sitter horizon--are briefly discussed.
Aldrovandi Ruben
Beltran Almeida Juan P.
Pereira J. G.
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