16 citations · 42 across the 6 of their papers we have counts for
6 papers
Finite time pseudo-rip singularity in cosmology
Mariusz P. Dąbrowski, Teodor Borislavov Vasilev
By studying first a new decelerating sudden future singularity (SFS) universe we report finding a novel type of cosmological singularity which we dub a finite time pseudo-rip (FTPR…
K-nonizing
Jose Beltrán Jiménez, Teodor Borislavov Vasilev, Darío Jaramillo-Garrido +2
We unveil the dynamical equivalence of field theories with non-canonical kinetic terms and canonical theories with a volume element invariant under transverse diffeomorphisms. The…
Dark energy with a shift-symmetric scalar field: obstacles, loophole hunting and dead ends
Teodor Borislavov Vasilev, Mariam Bouhmadi-López, Prado Martín-Moruno
We discuss the possibility of a scalar field being the fundamental description of dark energy. We focus on shift-symmetric scalar-tensor theories since this symmetry potentially av…
Big rip in shift-symmetric Kinetic Gravity Braiding theories
Teodor Borislavov Vasilev, Mariam Bouhmadi-López, Prado Martín-Moruno
We revise the future fate of a group of scalar-tensor theories known as kinetic gravity braiding models. As it is well-known, these theories can safely drive the expansion of the u…
The classical and quantum fate of the Little Sibling of the Big Rip in cosmology
Teodor Borislavov Vasilev, Mariam Bouhmadi-López, Prado Martín-Moruno
The Little Sibling of the Big Rip is a cosmological abrupt event predicted by some phantom cosmological models that could describe our Universe. When this event is approached the o…
Stability in quadratic torsion theories
Teodor Borislavov Vasilev, Jose A. R. Cembranos, Jorge Gigante Valcarcel +1
We revisit the definition and some of the characteristics of quadratic theories of gravity with torsion. We start from the most general Lagrangian density quadratic in the curvatur…