Zobrazeno 1 - 10
of 3 528
pro vyhledávání: '"Jimenéz, José A."'
The Euclidean path integral approach to quantum gravity is conventionally formulated in terms of the Einstein-Hilbert-York-Gibbons-Hawking action, which requires suitable subtractions to produce the correct black hole partition function. However, the
Externí odkaz:
http://arxiv.org/abs/2412.13946
We study a class of homogeneous but anisotropic cosmologies within the family of shift-symmetric Horndeski theories, where the scalar field features an inhomogeneous profile but it preserves a translational symmetry that is realised as a combination
Externí odkaz:
http://arxiv.org/abs/2412.12018
We investigated the radial and non-radial fundamental ($f$) mode oscillations of self-bound (quark) stars obtained after employing the Vector MIT (vMIT) bag model. Within this model, we computed the equation of state for strange quark matter satisfyi
Externí odkaz:
http://arxiv.org/abs/2412.05752
We compute the evolution of linear perturbations on top of a background solution of a general nonlinear electromagnetic theory. This evolution can be described in terms of two effective metrics, and we analyse under what conditions they are conformal
Externí odkaz:
http://arxiv.org/abs/2411.07898
The increasing quality of cosmological data has revealed some tensions that could be signalling the necessity of incorporating new physics into our cosmological model. One particularly intriguing possibility is the existence of elastic interactions b
Externí odkaz:
http://arxiv.org/abs/2410.18645
We investigate the behavior of the dense and cold (normalized) QCD trace anomaly, $\Delta$, in the interior of twin neutron stars (obtained from several sets of equations of state in agreement with modern compact-star and multimessenger data) satisfy
Externí odkaz:
http://arxiv.org/abs/2408.11614
Scalar field theories with a shift symmetry come equipped with the $K$-mouflage (or kinetic screening) mechanism that suppresses the scalar interaction between massive objects below a certain distance, the screening radius. In this work, we study the
Externí odkaz:
http://arxiv.org/abs/2407.08627
Autor:
Xu, Mingyu, Jimenez, Jose L. Gonzalez, Jose, Greeshma C., Boonkird, Artittaya, Xing, Chengkun, Harrod, Chelsea, Li, Xinle, Zhou, Haidong, Gaiser, Alyssa, Ke, Xianglin, Bi, Wenli, Li, Mingda, Xie, Weiwei
The investigation of crystallographic, electronic, and magnetic characteristics, especially the mixed valences of Eu$^{2+}$ and Eu$^{3+}$ under pressure of a novel europium-based bismuth selenide compound, Eu$_4$Bi$_6$Se$_{13}$, presented. This new c
Externí odkaz:
http://arxiv.org/abs/2407.00163
Autor:
Bello-Morales, Antonio G., Jiménez, Jose Beltrán, Cano, Alejandro Jiménez, Maroto, Antonio L., Koivisto, Tomi S.
Theories formulated in the arena of teleparallel geometries are generically plagued by ghost-like instabilities or other pathologies that are ultimately caused by the breaking of some symmetries. In this work, we construct a class of ghost-free theor
Externí odkaz:
http://arxiv.org/abs/2406.19355
Autor:
Montaguth, Gissel P., Monachesi, Antonela, Torres-Flores, Sergio, Gómez, Facundo A., Lima-Dias, Ciria, Cortesi, Arianna, de Oliveira, Claudia Mendes, Telles, Eduardo, Panda, Swayamtrupta, Grossi, Marco, Lopes, Paulo A. A., O'Mill, Ana Laura, Hernandez-Jimenez, Jose A., Olave-Rojas, D. E., Demarco, Ricardo, Kanaan, Antonio, Ribeiro, Tiago, Schoenell, William
Compact groups (CGs) of galaxies are extreme environments for morphological transformations and the cessation of star formation. Our objective is to understand the dynamics of CGs and how their surrounding environment impacts galaxy properties. We se
Externí odkaz:
http://arxiv.org/abs/2406.14671