Zobrazeno 1 - 10
of 218
pro vyhledávání: '"VILASI, G."'
Publikováno v:
Class.Quant.Grav.28:195014,2011
A solution of the old problem raised by Tolman, Ehrenfest, Podolsky and Wheeler, concerning the lack of attraction of two light pencils "moving parallel", is proposed, considering that the light can be source of nonlinear gravitational waves correspo
Externí odkaz:
http://arxiv.org/abs/1009.3849
We report here the existence of Ermanno-Bernoulli type invariants for the Manev model dynamics which may be viewed upon as remnants of Laplace-Runge-Lenz vector whose conservation is characteristic of the Kepler model. If the orbits are bounded these
Externí odkaz:
http://arxiv.org/abs/nlin/0609002
Publikováno v:
Phys.Lett. B638 (2006) 85-88
An interesting connection between the Regge theory of scattering, the Veneziano amplitude, the Lee-Yang theorems in statistical mechanics and nonextensive Renyi entropy is addressed. In this scheme the standard entropy and the Renyi entropy appear to
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605225
Exact solutions of Einstein field equations invariant for a non-Abelian 2-dimensional Lie algebra of Killing fields are described. Physical properties of these gravitational fields are studied, their wave character is checked by making use of covaria
Externí odkaz:
http://arxiv.org/abs/gr-qc/0512159
Autor:
Canfora, F., Vilasi, G.
Publikováno v:
Phys.Lett. B625 (2005) 171-176
A scenario is proposed in which the matter-antimatter asymmetry behaves like a seed for the inflationary phase of the universe. The mechanism which makes this scenario plausible is the holographic principle: this scheme is supported by a good predict
Externí odkaz:
http://arxiv.org/abs/gr-qc/0505091
Autor:
Canfora, F., Vilasi, G.
Publikováno v:
Phys.Lett. B614 (2005) 131-139
It is likely that the holographic principle will be a consequence of the would be theory of quantum gravity. Thus, it is interesting to try to go in the opposite direction: can the holographic principle fix the gravitational interaction? It is shown
Externí odkaz:
http://arxiv.org/abs/gr-qc/0503073
Autor:
Canfora, F., Vilasi, G.
Publikováno v:
Class.Quant.Grav.22:1193-1205,2005
The matching between two 4-dimensional PP-waves is discussed by using Israel's matching conditions. Physical consequences on the dynamics of (cosmic) strings are analyzed. The extension to space-time of arbitrary dimension is discussed and some inter
Externí odkaz:
http://arxiv.org/abs/gr-qc/0502075
We introduce the notion of a real form of a Hamiltonian dynamical system in analogy with the notion of real forms for simple Lie algebras. This is done by restricting the complexified initial dynamical system to the fixed point set of a given involut
Externí odkaz:
http://arxiv.org/abs/nlin/0310005
Autor:
Canfora, F., Vilasi, G.
A model is proposed to describe a transition from a Schwarzschild black hole of mass $M_{0}$ to a Schwarzschild black hole of mass $M_{1}$ $\leq M_{0}$. The basic equations are derived from the non-vacuum Einstein field equations taking a source repr
Externí odkaz:
http://arxiv.org/abs/gr-qc/0302036
Autor:
Canfora, F., Vilasi, G.
Publikováno v:
Phys.Lett. B585 (2004) 193-199
Non-vacuum exact gravitational waves invariant for a non Abelian two-dimensional Lie algebra generated by two Killing fields whose commutator is of light type, are described. The polarization of these waves, already known from previous works, is rela
Externí odkaz:
http://arxiv.org/abs/gr-qc/0301083