Zobrazeno 1 - 10
of 189
pro vyhledávání: '"Moniz, Paulo"'
Holographic dark energy theories present a fascinating interface to probe late-time cosmology, as guided by contemporary ideas about quantum gravity. In this work, we present a new holographic dark energy scenario designated Fractional Holographic Da
Externí odkaz:
http://arxiv.org/abs/2407.16685
Publikováno v:
Class. Quantum Grav. 40, 223001 (2023)
In this review, we focus on whether a canonical quantization of general relativity can produce testable predictions for cosmology. In particular, we examine how this approach can be used to model the evolution of primordial perturbations. This progra
Externí odkaz:
http://arxiv.org/abs/2306.14948
Publikováno v:
Physics of the Dark Universe 37 (2022) 101112
We study the geodesic deviation (GD) equation in a generalized version of the S\'{a}ez--Ballester (SB) theory in arbitrary dimensions. We first establish a general formalism and then restrict to particular cases, where (i) the matter-energy distribut
Externí odkaz:
http://arxiv.org/abs/2203.00766
Publikováno v:
Phys. Rev. D 105, 084050 (2022)
An Oppenheimer-Snyder (OS)-type collapse is considered for a Dvali-Gabadadze-Porrati (DGP) brane, whereas a Gauss-Bonnet (GB) term is provided for the bulk. We study the combined effect of the DGP induced gravity plus the GB curvature, regarding any
Externí odkaz:
http://arxiv.org/abs/2202.02238
We propose a polymer quantization scheme to derive the effective propagation of gravitational waves on a classical Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime. These waves, which may originate from a high energy source, are a consequence of
Externí odkaz:
http://arxiv.org/abs/2111.00292
Autor:
Saridakis, Emmanuel N., Lazkoz, Ruth, Salzano, Vincenzo, Moniz, Paulo Vargas, Capozziello, Salvatore, Jiménez, Jose Beltrán, De Laurentis, Mariafelicia, Olmo, Gonzalo J., Akrami, Yashar, Bahamonde, Sebastian, Blázquez-Salcedo, Jose Luis, Böhmer, Christian G., Bonvin, Camille, Bouhmadi-López, Mariam, Brax, Philippe, Calcagni, Gianluca, Casadio, Roberto, Cembranos, Jose A. R., de la Cruz-Dombriz, Álvaro, Davis, Anne-Christine, Delhom, Adrià, Di Valentino, Eleonora, Dialektopoulos, Konstantinos F., Elder, Benjamin, Ezquiaga, Jose María, Frusciante, Noemi, Garattini, Remo, Gergely, László Á., Giusti, Andrea, Heisenberg, Lavinia, Hohmann, Manuel, Iosifidis, Damianos, Kazantzidis, Lavrentios, Kleihaus, Burkhard, Koivisto, Tomi S., Kunz, Jutta, Lobo, Francisco S. N., Martinelli, Matteo, Martín-Moruno, Prado, Mimoso, José Pedro, Mota, David F., Peirone, Simone, Perivolaropoulos, Leandros, Pettorino, Valeria, Pfeifer, Christian, Pizzuti, Lorenzo, Rubiera-Garcia, Diego, Said, Jackson Levi, Sakellariadou, Mairi, Saltas, Ippocratis D., Mancini, Alessio Spurio, Voicu, Nicoleta, Wojnar, Aneta
General Relativity and the $\Lambda$CDM framework are currently the standard lore and constitute the concordance paradigm. Nevertheless, long-standing open theoretical issues, as well as possible new observational ones arising from the explosive deve
Externí odkaz:
http://arxiv.org/abs/2105.12582
Publikováno v:
Phys. Rev. D 103, 084053 (2021)
The linearized Einstein field equations provide a low-energy wave equation for the propagation of gravitational fields which may originate from a high energy source. Motivated by loop quantum gravity, we propose the polymer quantization scheme to der
Externí odkaz:
http://arxiv.org/abs/2012.09366
Publikováno v:
Phys. Rev. D 103, 084039 (2021)
The Dvali-Gabadadze-Porrati (DGP) braneworld model is employed to study the gravitational collapse of dust, with a Gauss-Bonnet (GB) term present in the five-dimensional bulk. We find that, within the normal (nonself-accelerating) DGP branch and due
Externí odkaz:
http://arxiv.org/abs/2012.05642