Zobrazeno 1 - 10
of 182
pro vyhledávání: '"Letelier, Patricio S."'
Publikováno v:
Gen. Relativ. Gravit. (2014) 46:1641
We construct a class of static, axially symmetric solutions representing razor-thin disks of matter in an Integrable Weyl-Dirac theory proposed in Found. Phys. 29, 1303 (1999). The main differences between these solutions and the corresponding genera
Externí odkaz:
http://arxiv.org/abs/1305.2662
Autor:
Letelier, Patricio. S.
We study a noncovariant theory of gravitation based on the Lagrangian density $\sqrt{-g})^\omega R$, where $\omega$ is a constant. In particular, we study solutions that for $\omega=1$ reduces to the de Sitter, Kasner and LFRW (with perfect fluid wit
Externí odkaz:
http://arxiv.org/abs/1105.3208
Publikováno v:
Mon.Not.Roy.Astron.Soc. 414, 3105-3116 (2011)
We study the motion of test particles around a center of attraction represented by a monopole (with and without spheroidal deformation) surrounded by a ring, given as a superposition of Morgan & Morgan discs. We deal with two kinds of bounded orbits:
Externí odkaz:
http://arxiv.org/abs/1103.4616
We review our contribution to infrared Renormalization Group (RG) effects to General Relativity in the context of galaxies. Considering the effective action approach to Quantum Field Theory in curved background, we argued that the proper RG energy sc
Externí odkaz:
http://arxiv.org/abs/1102.2188
Publikováno v:
Phys.Rev.D82:043514,2010
The components of the Riemann tensor in the tetrad basis are quantized and, through the Einstein equation, we find the local expectation value in the ontological interpretation of quantum mechanics of the energy density and pressure of a perfect flui
Externí odkaz:
http://arxiv.org/abs/1008.0991
Autor:
Piragua, Hernán, Letelier, Patricio S.
The lambda-phi4 kink is linearly and topologically stable. We study how extra energy perturbations are dissipated beyond the linear regime. We found that depending on the width, amplitude and energy of a Gaussian perturbation different scenarios are
Externí odkaz:
http://arxiv.org/abs/1004.4643
Publikováno v:
JCAP 1004:020,2010
We consider the application of quantum corrections computed using renormalization group arguments in the astrophysical domain and show that, for the most natural interpretation of the renormalization group scale parameter, a gravitational coupling pa
Externí odkaz:
http://arxiv.org/abs/0911.4967
Publikováno v:
Phys.Rev.D80:104035,2009
The behavior of a massive scalar particle on the spacetime surrounding a monopole is studied from a quantum mechanical point of view. All the boundary conditions necessary to turn into self-adjoint the spatial portion of the wave operator are found a
Externí odkaz:
http://arxiv.org/abs/0911.2626
Publikováno v:
Phys.Rev.D78:084038,2008
The stability under radial and vertical perturbations of circular orbits associated to particles orbiting a spherically symmetric center of attraction is study in the context of the n-dimensional: Newtonian theory of gravitation, Einstein's general r
Externí odkaz:
http://arxiv.org/abs/0810.1177
Publikováno v:
Phys.Rev.D77:124030,2008
The spinless Ba\~nados-Teiltelboim-Zanelli (BTZ) spacetime is considered in the quantum theory context. Specially, we study the case of negative mass parameter using quantum test particles obeying the Klein-Gordon and Dirac equations. We study if thi
Externí odkaz:
http://arxiv.org/abs/0805.3926