Massive gravitational modes in effective field theories can be recovered by extending general relativity and taking into account generic functions of the curvature invariants, not necessarily linear in the Ricci scalar R. In particular, adopting the minimal extension of f(R) gravity, an effective field theory with massive modes is straightforwardly recovered. This approach allows to evade shortcomings like ghosts and discontinuities if a suitable choice of expansion parameters is performed.
An effective field theory description for extended gravity / Ricciardi, Giulia; Capozziello, Salvatore; DE LAURENTIS, Mariafelicia. - (2017), pp. 1331-1339. (Intervento presentato al convegno MG14 Meeting on General Relativity University of Rome “La Sapienza”, Italy, 12 – 18 July 2015 tenutosi a Roma nel 12-18 luglio 2015) [10.1142/9789813226609_0108].
An effective field theory description for extended gravity
Giulia Ricciardi
;Salvatore Capozziello
;Mariafelicia De Laurentis
2017
Abstract
Massive gravitational modes in effective field theories can be recovered by extending general relativity and taking into account generic functions of the curvature invariants, not necessarily linear in the Ricci scalar R. In particular, adopting the minimal extension of f(R) gravity, an effective field theory with massive modes is straightforwardly recovered. This approach allows to evade shortcomings like ghosts and discontinuities if a suitable choice of expansion parameters is performed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
