Artículos de revistas
DE SITTER TRANSITIVITY, CONFORMAL TRANSFORMATIONS AND CONSERVATION LAWS
Fecha
2014-04-01Registro en:
International Journal Of Modern Physics D. Singapore: World Scientific Publ Co Pte Ltd, v. 23, n. 4, 11 p., 2014.
0218-2718
10.1142/S0218271814500357
WOS:000333092900010
1599966126072450
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Minkowski spacetime is transitive under ordinary translations, a transformation that do not have matrix representations. The de Sitter spacetime, on the other hand, is transitive under a combination of translations and proper conformal transformations, which do have a matrix representation. Such matrix, however, is not by itself a de Sitter generator: it gives rise to a conformal re-scaling of the metric, a transformation not belonging to the de Sitter group, and in general not associated with diffeomorphisms in spacetime. When dealing with variational principles and Noether's theorem in de Sitter spacetime, it is necessary to regularize the transformations in order to eliminate the conformal re-scaling of the metric.