Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Francisco José Maldonado Torralba"'
Publikováno v:
Physics Letters B, Vol 846, Iss , Pp 138211- (2023)
In this work we shall obtain sufficient conditions for the appearance of singularities in gravitational theories which propagate an extra vector degree of freedom, based on the known relaxations of the singularity theorems. We study the cases of a ge
Externí odkaz:
https://doaj.org/article/ac9bcb790b8548cf8df9f687b524ba1c
Publikováno v:
Physics Letters B, Vol 834, Iss , Pp 137488- (2022)
The stable pseudo-scalar degree of freedom of the quadratic Poincaré Gauge theory of gravity is shown to be a suitable dark matter candidate. We find the parameter space of the theory which can account for all the predicted cold dark matter, and con
Externí odkaz:
https://doaj.org/article/d406307146d84e44899dbd3f9473e501
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 3, Pp 1-13 (2021)
Abstract In this manuscript we will present the theoretical framework of the recently proposed infinite derivative theory of gravity with a non-symmetric connection. We will explicitly derive the field equations at the linear level and obtain new sol
Externí odkaz:
https://doaj.org/article/8345abd31f8f4d109229af4eda71b07e
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 7, Pp 1-16 (2020)
Abstract Poincaré gauge theories provide an approach to gravity based on the gauging of the Poincaré group, whose homogeneous part generates curvature while the translational sector gives rise to torsion. In this note we revisit the stability of th
Externí odkaz:
https://doaj.org/article/c359bf582d6344fea23c97dbca9138c0
Autor:
Anupam Mazumdar, Carlos Heredia Pimienta, Josep Llosa, Ivan Kolar, Francisco José Maldonado Torralba
Publikováno v:
Classical and Quantum Gravity, 39(8):085001. IOP PUBLISHING LTD
This article aims to transform the infinite-order Lagrangian density for ghost-free infinite-derivative linearized gravity into non-local. To achieve it, we use the theory of generalized functions and the Fourier transform in the space of tempered di
Publikováno v:
Physical Review D, 105(4):044045. AMER PHYSICAL SOC
We present a new bouncing cosmological solution of the non-local theory known as infinite derivative gravity, which goes beyond the recursive ansatz, ${\Box R = r_1 R +r_2}$. The non-local field equations are evaluated using the spectral decompositio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77012fcc7e4caad51b249aef28d45092
https://research.rug.nl/en/publications/d17386a1-0a69-4d14-b21d-71876ab38a4d
https://research.rug.nl/en/publications/d17386a1-0a69-4d14-b21d-71876ab38a4d
Publikováno v:
Physics Letters
The stable pseudo-scalar degree of freedom of the quadratic Poincar\'e Gauge theory of gravity is shown to be a suitable dark matter candidate. We find the parameter space of the theory which can account for all the predicted cold dark matter, and co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82bc7dc5755977504788d95f364ce469
http://arxiv.org/abs/2112.03957
http://arxiv.org/abs/2112.03957
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2022:044
In this work we study the stability of the four vector irreducible pieces of the torsion and the nonmetricity tensors in the general quadratic metric-affine Lagrangian in 4 dimensions. The goal will be to elucidate under which conditions the spin-1 m
Publikováno v:
Physical Review D, 103:064078. AMER PHYSICAL SOC
The junction conditions for the infinite derivative gravity theory ${R{+}RF(\Box)R}$ are derived under the assumption that the conditions can be imposed by avoiding the `ill-defined expressions' in the theory of distributions term by term in infinite
This book presents the most common types of instabilities arising in classical field theories, namely tachyonic, Laplacian, ghost-like or strong coupling instabilities, also commenting on their quantum implications. The authors provide a detailed acc