Artículos de revistas
A generalized action for(2 + 1)-dimensional Chern–Simons gravity
Registration in:
Journal of Physics A Mathematical and Theoretical 45
1751-8121
Author
Díaz, José
Fierro, Octavio
Izaurieta, Fernando
Merino, Nelson
Rodríguez, Eduardo
Salgado, Patricio
Valdivia, Omar
Abstract
Artículo de publicación ISI We show that the so-called semi-simple extended Poincar ́e (SSEP) algebra inDdimensions canbe obtained from the anti-de Sitter algebraso(D−1,2) by means of theS-expansion procedurewith an appropriate semigroupS. A general prescription is given for computing Casimir operatorsforS-expanded algebras, and the method is exemplified for the SSEP algebra. TheS-expansionmethod also allows us to extract the corresponding invariant tensor for the SSEP algebra, whichis a key ingredient in the construction of a generalized action for Chern–Simons gravity in 2 + 1dimensions.