Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Vasilev, Teodor"'
Publikováno v:
Phys.Dark Univ. 46 (2024) 101679
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 avoids some fine-tuning problems. We also restrict attention to theories
Externí odkaz:
http://arxiv.org/abs/2406.12576
Autor:
Ganeva, Margarita1 (AUTHOR) magiganeva@yahoo.com, Vasilev, Teodor1 (AUTHOR), Temelkova, Katya1 (AUTHOR), Hristova, Desislava1 (AUTHOR), Dimitrova, Anna1 (AUTHOR), Stefanov, Stefan1 (AUTHOR)
Publikováno v:
Biotechnology & Biotechnological Equipment. Dec2024, Vol. 38 Issue 1, p1-7. 7p.
Publikováno v:
JCAP 06 (2023) 026
We revise the expansion history of the scalar field theories known as Kinetic Gravity Braiding. These theories are well-known for the possibility of driving the expansion of the cosmos towards a future self-tuning de Sitter state when the correspondi
Externí odkaz:
http://arxiv.org/abs/2212.02547
Publikováno v:
Phys. Lett. B 838 (2023) 137711
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 universe towards a future de Sitter state if the corresponding Lagrangi
Externí odkaz:
http://arxiv.org/abs/2210.07276
Publikováno v:
In Physics of the Dark Universe December 2024 46
Publikováno v:
Universe 7 (2021) no.8, 288
The big rip, the little rip and the little sibling of the big rip are cosmological doomsdays predicted by some phantom dark energy models that could describe the future evolution of our Universe. When the universe evolves towards either of these futu
Externí odkaz:
http://arxiv.org/abs/2106.12050
Publikováno v:
Phys. Rev. D 103, 124049 (2021)
The little rip is a cosmological abrupt event predicted by some phantom dark energy models that could describe the future evolution of our Universe. This event can be interpreted as a big rip singularity delayed indefinitely, although in those models
Externí odkaz:
http://arxiv.org/abs/2103.12786
Publikováno v:
Phys. Rev. D 100, 084016 (2019)
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 observable Universe and its expansion rate grow infinitely, but its cos
Externí odkaz:
http://arxiv.org/abs/1907.13081
Autor:
Vasilev, Teodor Borislavov, Cembranos, Jose A. R., Valcarcel, Jorge Gigante, Martín-Moruno, Prado
Publikováno v:
Eur. Phys. J. C (2017) 77:755
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 curvature and torsion tensors. By assuming that General Relativity should be r
Externí odkaz:
http://arxiv.org/abs/1706.07080
Autor:
Vasilev, Teodor Borislavov1 (AUTHOR) teodorbo@ucm.es, Cembranos, Jose A. R.1 (AUTHOR), Valcarcel, Jorge Gigante1 (AUTHOR), Martín-Moruno, Prado1 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Oct2022, Vol. 82 Issue 10, p1-296. 296p.