129 citations · 492 across the 17 of their papers we have counts for
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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…