Zobrazeno 1 - 10
of 903
pro vyhledávání: '"Rocha, R. P."'
To understand the nature of the black holes that exist in the Universe, it is also necessary to study what happens to the (quantum) matter that collapses and forms such objects. In this work, we consider a dust ball with an electrically charged centr
Externí odkaz:
http://arxiv.org/abs/2407.04146
Autor:
Moreira, D. C., da Rocha, R.
Publikováno v:
Class. Quantum Grav. 41 (2024) 235009
Effective Lifshitz black holes with arbitrary dynamical exponent are addressed in the fluid/gravity membrane paradigm. The transport and the response coefficients in the dual Lifshitz field theory are calculated and analyzed, including the charge dif
Externí odkaz:
http://arxiv.org/abs/2405.01505
The effective action for quantum gravity coupled to matter contains corrections arising from the functional measure. We analyse the effect of such corrections for anisotropic self-gravitating compact objects described by means of the gravitational de
Externí odkaz:
http://arxiv.org/abs/2403.13099
Publikováno v:
Eur. Phys. J. C 84 (2024) 767
A connection is established between transonic sound waves propagating along a de Laval nozzle and quasinormal modes emitted from hairy black holes obtained with the gravitational decoupling method applied to the Reissner-Nordstr\"om geometry. Aerodyn
Externí odkaz:
http://arxiv.org/abs/2402.04682
Publikováno v:
Annals Phys. 459 (2023) 169545
This paper is focused on investigating the effects of a statistical interaction for graphene-like systems, providing Haldane-like properties for topologically trivial lattices. The associated self-energy correction yields an effective next-nearest ho
Externí odkaz:
http://arxiv.org/abs/2311.10073
Autor:
Gonçalves, D. Fabri, da Rocha, R.
The generalized Fierz identities are addressed in the K\"ahler-Atiyah bundle framework from the perspective of the equations governing constrained generalized Killing spinor fields. We explore the spin geometry in a Riemannian 8-manifold composing a
Externí odkaz:
http://arxiv.org/abs/2310.19530
Publikováno v:
Eur. Phys. J. C (2024) 84:253
This work investigates static and dynamical quark star properties within a $D_3-D_7$ holographic model. We solve the Tolman-Oppenheimer-Volkoff equations for the quark matter equation of state obtained from the brane configuration. We determine the m
Externí odkaz:
http://arxiv.org/abs/2310.17719
We study different entropies for coherent states representing the geometry of spherically symmetric compact systems. We show that the thermodynamic entropy reproduces the Bekenstein-Hawking result in the presence of thermal modes at the Hawking tempe
Externí odkaz:
http://arxiv.org/abs/2310.07505
Autor:
Casadio, R., da Rocha, R.
Publikováno v:
Eur. Phys. J. C 83 (2023) 537
The minimal geometric deformation (MGD) paradigm is here employed to survey axion stars on fluid branes. The finite value of the brane tension provides beyond-general relativity corrections to the density, compactness, radius, and asymptotic limit of
Externí odkaz:
http://arxiv.org/abs/2305.15752
Publikováno v:
Phys. Lett. B 146 (2023) 138174
Strange axial-vector kaons, $K_1$, and $f_1$ meson resonances are investigated in the 4-flavor AdS/QCD model. Their underlying differential configurational entropy is computed and the mass spectra of higher-excited resonances, in both these mesonic f
Externí odkaz:
http://arxiv.org/abs/2304.05122