info:eu-repo/semantics/article
On four-dimensional Einsteinian gravity, quasitopological gravity, cosmology and black holes
Fecha
2020-06-10Registro en:
Cisterna Roa, Adolfo René; Grandi, Nicolás Esteban; Oliva, Julio; On four-dimensional Einsteinian gravity, quasitopological gravity, cosmology and black holes; Elsevier Science; Physics Letters B; 805; 135435; 10-6-2020; 1-16
0370-2693
CONICET Digital
CONICET
Autor
Cisterna Roa, Adolfo René
Grandi, Nicolás Esteban
Oliva, Julio
Resumen
We show that the combination of cubic invariants defining five-dimensional quasitopological gravity, when written in four dimensions, reduce to the version of four-dimensional Einsteinian gravity recently proposed by Arciniega, Edelstein & Jaime, that produces second order equations of motion in a FLRW ansatz, with a purely geometrical inflationary period. We introduce a quartic version of the four-dimensional Einsteinian theory with similar properties, and study its consequences. In particular we found that there exists a region on the space of parameters which allows for thermodynamically stable black holes, as well as a well-defined cosmology with geometrically driven inflation. We briefly discuss the cosmological inhomogeneities in this setup. We also provide a combination of quintic invariants with those properties.