ListarArticulos, Pre-prints (Centro de Física Fundamental (CFF)) por tema "Cosmología cuántica"

Mostrando ítems 1-13 de 13

    • Comment on Ricci Collineations of static spherically symmetric spacetimes 

      Núñez, Luis; Percoco, Umberto; Contreras, Gerardo; Bertolotti, Ricardo; Carot, Jaume (SABER ULA, 2006-01-26)
      Comment on Ricci Collineations of static spherically symmetric spacetimes (Núñez, Luis; Contreras, Gerardo; Percoco, Umberto; Bertolotti, Ricardo; Carot, J.) Abstract We present a counter example to a theorem given ...

    • 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, ...

    • Nonlocal equation of state in general relativistic radiating spheres 

      Núñez, Luis; Percoco, Umberto; Hernández G., Héctor (SABER ULA, 2006-01-26)
      Nonlocal equation of state in general relativistic radiating spheres (Núñez, Luis; Hernández, Hector; Percoco, Umberto) Abstract We show that under particular circumstances a general relativistic spherically symmetric ...

    • On the eccentricity behaviour of radiating slowly rotating bodies in general relativity 

      Núñez, Luis; Herrera Cometta, Luis; Percoco, Umberto; Hernández G., Héctor (SABER ULA, 2006-01-26)
      On the eccentricity behaviour of radiating slowly rotating bodies (Núñez, Luis; Hernández, Hector; Herrera, Luis; Percoco, Umberto) Abstract We study different models of radiating slowly rotating bodies up to the ...

    • Ricci collineations for non-degenerate, diagonal and spherically symmetric ricci tensors 

      Núñez, Luis; Percoco, Umberto; Contreras, Gerardo (SABER ULA, 2006-01-26)
      Ricci collineations for non-degenerate, diagonal and spherically symmetric ricci tensors (Núñez, Luis; Percoco, Umberto; Contreras, Gerardo) Abstract The expression of the vector field generator of a Ricci Collineation ...

    • Ricci collineations for type B warped space-times 

      Núñez, Luis; Percoco, Umberto; Carot, Jaume (SABER ULA, 2006-01-26)
      Ricci collineations for type B warped space-times (Núñez, Luis; Percoco, Umberto; Carot, J.) Abstract We present the general structure of proper Ricci Collineations (RC) for type B warped space-times. Within this ...

    • 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 ...

    • Static anisotropic solutions to Einstein equations with a nonlocal equation of state 

      Núñez, Luis; Hernández G., Héctor (SABER ULA, 2005-04-18)
      Static anisotropic solutions to Einstein equations with a nonlocal equation of state (Núñez, Luis; Hernández, Hector) Abstract We present a general method to obtain static anisotropic spherically symmetric solutions, ...

    • 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 ...

    • The 3-dimensional einstein-klein-gordon system in characteristic numerical relativity. 

      Barreto Acevedo, Willians; Da Silva, A.; Gómez, R.; Lehner, R.; Rosales, L.; Winicour, J. (SABER ULA, 2005-09-18)
      The 3-dimensional einstein-klein-gordon system in characteristic numerical relativity. (Barreto Acevedo, Willians; Da Silva, A.; Gómez, R.; Lehner, R.; Rosales, L.; Winicour, J..) Abstract We incorporate a massless ...

    • 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 ...