Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Rubilar, Guillermo"'
Since the derivation of a well-defined $D\to4$ limit for 4D Einstein-Gauss-Bonnet (4DEGB) gravity coupled to a scalar field, there has been considerable interest in testing it as an alternative to Einstein's general theory of relativity. Past work ha
Externí odkaz:
http://arxiv.org/abs/2412.15459
Publikováno v:
Phys. Rev. D 102, 044027 (2020)
By extending the framework of the gravitational clock compass we show how a suitably prepared set of clocks can be used to extract information about the gravitational field in the context of General Relativity. Conceptual differences between the exte
Externí odkaz:
http://arxiv.org/abs/2006.09716
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
In this paper we present a new family of wormhole geometries in Lovelock theories with a unique vacuum, and study their stability under scalar field perturbations. As the solutions already known in the literature for Chern-Simons gravity on AdS, the
Externí odkaz:
http://arxiv.org/abs/1812.02089
Publikováno v:
Phys. Rev. D 92, 104010 (2015)
We study conservation laws for gravity theories invariant under general coordinate transformations. The class of models under consideration includes Einstein's general relativity theory as a special case as well as its generalizations to non-Riemanni
Externí odkaz:
http://arxiv.org/abs/1507.02191
Publikováno v:
J. Opt. 17, 025611 (2015)
We study the problem of the definition of the energy-momentum tensor of light in general moving non-dispersive media with linear constitutive law. Using the basic principles of classical field theory, we show that for the correct understanding of the
Externí odkaz:
http://arxiv.org/abs/1310.0518
Publikováno v:
Physical Review E 86, 031703 (2012)
We develop a relativistic variational model for a nematic liquid crystal interacting with an electro- magnetic field. The constitutive relation for a general anisotropic uniaxial diamagnetic and dielectric medium is analyzed. We discuss light wave pr
Externí odkaz:
http://arxiv.org/abs/1203.3122
Publikováno v:
Phys.Lett.A375:1703-1709,2011
We analyse the "Einstein box" thought experiment and the definition of the momentum of light inside matter. We stress the importance of the total energy-momentum tensor of the closed system (electromagnetic field plus material medium) and derive in d
Externí odkaz:
http://arxiv.org/abs/1103.1654
Publikováno v:
Class.Quant.Grav.26:215014,2009
The energy and momentum transported by exact plane gravitational-wave solutions of Einstein equations are computed using the teleparallel equivalent formulation of Einstein's theory. It is shown that these waves transport neither energy nor momentum.
Externí odkaz:
http://arxiv.org/abs/0909.4408
Publikováno v:
Phys.Lett.B660:240-246,2008
We develop a general approach, based on the Lagrange-Noether machinery, to the definition of invariant conserved currents for gravity theories with general coordinate and local Lorentz symmetries. In this framework, every vector field \xi on spacetim
Externí odkaz:
http://arxiv.org/abs/0712.3551