Listar Articulos, Pre-prints (Facultad de Ciencias) por autor "Pantoja, Nelson"

Mostrando ítems 1-15 de 15

    • Close to the edge: hierarchy in a double braneworld 

      Guerrero, Rommel; Pantoja, Nelson; Melfo, Alejandra; Rodriguez, Omar (SABER ULA, 2007-03-19)
      Close to the edge: hierarchy in a double braneworld. (Guerrero, Rommel; Melfo, Alejandra; Pantoja, Nelson and Rodriguez, R. Omar) Abstract We show that the hierarchy between the Planck and the weak scales can follow ...

    • Covariant duality symmetric actions 

      Khoudeir, Adel; Pantoja, Nelson (SABER ULA, 2005-01-06)
      Covariant duality symmetric actions (Khoudeir, Adel; Pantoja, Nelson) Abstract A manifestly Lorentz and diffeomorphism invariant form for the abelian gauge field action with local duality symmetry of Schwarz and ...

    • Curvature singularity of the distributional BTZ black hole geometry 

      Pantoja, Nelson; Rago, Héctor; Rodríguez, R.O. (SABER ULA, 2005-05-25)
      Curvature singularity of the distributional BTZ black hole geometry Pantoja, Nelson; Rago, Héctor; Rodríguez, R.O. Abstract For the non-rotating BTZ black hole, the distributional curvature ...

    • Distributional sources in general relativity: 

      Pantoja, Nelson; Rago, Héctor (SABER ULA, 2003-07-04)
      Distributional sources in general relativity: Two point-like examples revisited (Pantoja, Nelson; Rago, Hector) Abstract A regularization procedure, that allows one to relate singularities of curvature to those ...

    • Energy-momentum tensor valued distributions for the Schwarzschild and Reissner-Nordstrom geometries 

      Pantoja, Nelson; Rago, Héctor (SABER ULA, 2003-07-04)
      Energy-momentum tensor valued distributions for the Schwarzschild and Reissner-Nordstrom geometries (Pantoja, Nelson; Rago, Hector) Abstract An approach to computing, withing the framework of distribution theory, ...

    • Fermion localization on thick branes 

      Melfo, Alejandra; Pantoja, Nelson; Tempo, José David (SABER ULA, 2007-03-19)
      Fermion localization on thick branes. (Melfo, Alejandra; Pantoja, Nelson and Tempo, José David) Abstract We consider chiral fermion confinement in scalar thick branes, which are known to localize gravity, coupled ...

    • Gauge theories at finite temperature and the background field method 

      Antikainen, J.; Pantoja, Nelson; Chaichian, M.; Salazar, J. J. (SABER ULA, 2006-01-19)
      Gauge theories at finite temperature and the background field method Antikainen, J.; Chaichian, M.; Pantoja, N.R.; Salazar, J.J. Abstract The background field method has been employed to ...

    • Localizing gravity on exotic thick 3-branes 

      Pantoja, Nelson; Melfo, Alejandra; Castillo Felisola, Oscar; Ramírez, Alba (SABER ULA, 2007-03-19)
      Localizing gravity on exotic thick 3-branes Castillo-Felisola, Oscar; Melfo, Alejandra; Pantoja, Nelson; Ramírez, Alba Abstract We consider localization of gravity on thick branes with a ...

    • New BPS domain wall solutions. 

      Pantoja, Nelson; Ramírez, Alba (SABER ULA, 2007-03-28)
      New BPS domain wall solutions. (Pantoja, Nelson y Ramírez, Alba) Abstract Smooth solutions of gravity-scalar field models which represents BPS domain wall spacetimes with a well defined thin wall limit are obtained ...

    • On the collineations of distribution-valued Ricci tensor fields of domain wall spacetimes. 

      Pantoja, Nelson; Sanoja, Alberto (SABER ULA, 2007-03-27)
      On the collineations of distribution-valued Ricci tensor fields of domain wall spacetimes. (Pantoja, Nelson y Sanoja, Alberto) Abstract Generalizing the Lie derivative to distribution-valued tensors, we examine the ...

    • PP waves and distributional curvature 

      Pantoja, Nelson; Ramírez, Freddy (SABER ULA, 2007-03-19)
      PP waves and distributional curvature. (Nelson Pantoja and Freddy Ramírez) Abstract We carry out the distributional analysis of the geometry of a spacetime associated to gravitational waves propagating in a magnetic ...

    • Self-gravitating domain walls and the thin-wall limit 

      Pantoja, Nelson; Melfo, Alejandra; Guerrero, Rommel (SABER ULA, 2005-05-25)
      Self-gravitating domain walls and the thin-wall limit Guerrero, Rommel, Melfo, Alejandra; Pantoja, Nelson Abstract We analyse the distributional thin wall limit of self gravitating scalar ...

    • Spin waves at the ferromagnetic-antiferromagnetic interface 

      Pestana, E.; Pantoja, Nelson; Mata, G.J. (SABER ULA, 2005-06-06)
      Spin waves at the ferromagnetic-antiferromagnetic interface Pestana, E., Mata, G. J., Pantoja, N. Abstract We investigate the magnon modes in the neighbourhood of the interface between a ...

    • Symmetries of distributional domain wall geometries 

      Pantoja, Nelson; Sanoja, Alberto (SABER ULA, 2005-05-25)
      Symmetries of distributional domain wall geometries Pantoja, Nelson; Sanoja, Alberto Abstract Generalizing the Lie derivative of smooth tensor fields to distribution-valued tensors, we ...

    • Thick domain wall spacetimes with and without reflection symmetry 

      Pantoja, Nelson; Melfo, Alejandra; Skirzewski, Aureliano (SABER ULA, 2005-05-25)
      Thick domain wall spacetimes with and without reflection symmetry Melfo, Alejandra; Pantoja, Nelson; Skirzewski, Aureliano Abstract We show that the spacetimes of domain wall solutions to ...