129 citations · 492 across the 17 of their papers we have counts for
17 papers
Cosmological models in modified gravity theories with extended nonminimal derivative couplings
Tiberiu Harko, Francisco S. N. Lobo, Emmanuel N. Saridakis +1
We construct gravitational modifications that go beyond Horndeski, namely theories with extended nonminimal derivative couplings, in which the coefficient functions depend not only…
Bi-scalar modified gravity and cosmology with conformal invariance
Emmanuel N. Saridakis, Minas Tsoukalas
We investigate the cosmological applications of a bi-scalar modified gravity that exhibits partial conformal invariance, which could become full conformal invariance in the absence…
Cosmology in new gravitational scalar-tensor theories
Emmanuel N. Saridakis, Minas Tsoukalas
We investigate the cosmological applications of new gravitational scalar-tensor theories, which are novel modifications of gravity possessing 2+2 propagating degrees of freedom, ar…
Gravitational Collapse of a Homogeneous Scalar Field Coupled Kinematically to Einstein Tensor
George Koutsoumbas, Konstantinos Ntrekis, Eleftherios Papantonopoulos +1
We study the gravitational collapse of a homogeneous time-dependent scalar field that, besides its coupling to curvature, it is also kinematically coupled to the Einstein tensor. T…
On the action of the complete Brans-Dicke theory
Georgios Kofinas, Minas Tsoukalas
Recently the most general completion of Brans-Dicke theory was appeared with energy exchanged between the scalar field and ordinary matter, given that the equation of motion for th…
Warped-AdS3 black holes with scalar halo
Gaston Giribet, Minas Tsoukalas
We construct a stretched (aka Warped) Anti-de Sitter black hole in 3 dimensions supported by a real scalar field configuration. The latter is regular everywhere outside and on the…