Zobrazeno 1 - 10
of 297
pro vyhledávání: '"Barreto W"'
Publikováno v:
Annals Phys. 447 (2022) 169142
A family of deformed models of the sine-Gordon-type can be generated by twisting the sine-Gordon model. As a particular case, the 3-sine-Gordon model is here addressed, whose differential configurational entropy and the differential configurational c
Externí odkaz:
http://arxiv.org/abs/2207.06367
Publikováno v:
Class. Quantum Grav. 40 (2023) 075014
Two types of information entropy are studied for the quantum states of a model for the matter core inside a black hole geometry. A detailed description is first given of the quantum mechanical picture leading to a spectrum of bound states for a colla
Externí odkaz:
http://arxiv.org/abs/2206.10398
Autor:
Barreto, W., da Rocha, R.
Publikováno v:
Eur. Phys. J. Plus 137 (2022) 845
The gravitational collapse in asymptotically AdS spacetimes is studied, using the differential configurational entropy (DCE). The DCE is shown to comply with the instability of the Einstein-Klein-Gordon system, leading to different stages in the rout
Externí odkaz:
http://arxiv.org/abs/2202.03378
Autor:
Barreto, W., da Rocha, R.
Publikováno v:
Phys. Rev. D 105 (2022) 064049
The gravitational instability of kinks is scrutinized in the context of information entropy, including the black hole formation near the scalar field critical collapse. The differential configurational entropy (DCE) is computed and examined for globa
Externí odkaz:
http://arxiv.org/abs/2201.08324
Publikováno v:
Int. J. Modern Phys. D, 2250028 (2022)
We present a simple domain decomposition code based on the Galerkin-Collocation method to integrate the field equations of the Bondi problem. The algorithm is stable, exhibits exponential convergence when considering the Bondi formula as an error mea
Externí odkaz:
http://arxiv.org/abs/2110.09640
Publikováno v:
Phys. Rev. D 104, 084065 (2021)
Here we report a developed high performance and simplified version of the code denominated RIO, which can be easily extended, for the generalized BSSN formulation. We implement a code which is regular at the center of symmetry, without use a special
Externí odkaz:
http://arxiv.org/abs/2105.09094
Publikováno v:
Classical and Quantum Gravity 38, 225004 (2021)
We follow the strategy initiated in Ref. [1] and proceed with the implementation of the Galerkin-Collocation domain decomposition (GCDD) applied to the dynamics of a spherical self-gravitating scalar field with the field equation in the Cauchy formul
Externí odkaz:
http://arxiv.org/abs/2012.01302
Publikováno v:
GRG 53, 42 (2021)
We initiate a systematic implementation of the spectral domain decomposition technique with the Galerkin-Collocation (GC) method in situations of interest such as the spherical collapse of a scalar field in the characteristic formulation. We discuss
Externí odkaz:
http://arxiv.org/abs/2009.00115
Publikováno v:
Gen Relativ Gravit (2018) 50: 71
We present a computational framework (Rio) in the ADM 3+1 approach for numerical relativity. This work enables us to carry out high resolution calculations for initial data of two arbitrary black holes. We use the transverse conformal treatment, the
Externí odkaz:
http://arxiv.org/abs/1803.05833
Publikováno v:
Phys. Rev. D 97, 104035 (2018)
We present a new computational framework for the Galerkin-collocation method for double domain in the context of ADM 3+1 approach in numerical relativity. This work enables us to perform high resolution calculations for initial sets of two arbitrary
Externí odkaz:
http://arxiv.org/abs/1803.00850