The question of mass in (anti-) de Sitter spacetimes

Details The question of mass in (anti-) de Sitter spacetimes The question of mass in (anti-) de Sitter spacetimes

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jpha...41d4008g&link_type=abstract

Journal of Physics A: Mathematical and Theoretical, Volume 41, Issue 30, pp. 304008 (2008).

Physics

5

Scientific paper

The possible existence of a non-zero cosmological constant Λ gives rise to controversial interpretations. By Λ we here understand some sort of bare cosmological constant, and not the observed one that should contain modifications coming from the classical or the quantum fluctuations of matter fields. Is Λ a universal constant fixing the geometry of an empty universe, as fundamental as the Planck constant or the speed of light in the vacuum? Is it instead something emerging from a perturbative calculus performed on the metric solution of the Einstein equation and to which it might be given a material status of (dark or bright) 'energy'? Since a physical quantity like mass originates in a Minkowskian conservation law, we proceed to a group theoretical interpretation of this relation in terms of the two possible Λ-deformations of the Poincaré group, namely the de Sitter and anti de Sitter groups. We use the so-called Garidi mass in order to make clear the asymptotic relations between Minkowskian masses m and their possible dS/AdS counterparts.

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