9 citations · 9 across the 1 of their papers we have counts for
10 papers
WKB-type Approximation to Noncommutative Quantum Cosmology
E. Mena, O. Obregon, M. Sabido
In this work, we develop and apply the WKB approximation to several examples of noncommutative quantum cosmology, obtaining the time evolution of the noncommutative universe, this…
Noncommutative 6D Gauge Higgs Unification Models
J. C. Lopez-Dominguez, O. Obregon, C. Ramirez
The influence of higher dimensions in noncommutative field theories is considered. For this purpose, we analyze the bosonic sector of a recently proposed 6 dimensional SU(3) orbifo…
Non-Abelian Born-Infeld theory without the square root
O. Obregon
A non-Abelian Born-Infeld theory is presented. The square root structure that characterizes the Dirac-Born-Infeld (DBI) action does not appear. The procedure is based on an Abelian…
Time and "angular" dependent backgrounds from stationary axisymmetric solutions
Octavio Obregon, Hernando Quevedo, Michael P. Ryan
Backgrounds depending on time and on "angular" variable, namely polarized and unpolarized Gowdy models, are generated as the sector inside the horizons of the mani…
Noncommutative Topological Half-flat Gravity
H. Garcia-Compean, O. Obregon, C. Ramirez
We formulate a noncommutative description of topological half-flat gravity in four dimensions. BRST symmetry of this topological gravity is deformed through a twisting of the usual…
Towards the entropy of gravity time-dependent models via the Cardy-Verlinde formula
Octavio Obregon, Leonardo Patino, Hernando Quevedo
For models with several time-dependent components generalized entropies can be defined. This is shown for the Bianchi type IX model. We first derive the Cardy-Verlinde formula unde…