2008/08/31 by Fabrizio Canfora, Alex Giacomini · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.78.084034
published as Phys.Rev.D78:084034,2008 · LaTeX, 27 pages, no figures, some comments added. Version accepted for publication in Physical Review D
arxiv created 2008/10/17 · openalex publication_date 2008/10/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, new exact solutions in eight-dimensional Lovelock theory will be presented. These solutions are the vacuum static wormhole, the black hole, and generalized Bertotti-Robinson space-times with nontrivial torsion. All of the solutions have a cross product structure of the type M5\ifmmode×\else\texttimes\fi\ensuremathΣ3, where M5 is a five-dimensional manifold and \ensuremathΣ3 a compact constant curvature manifold. The wormhole is the first example of a smooth vacuum static Lovelock wormhole which is neither Chern-Simons nor Born-Infeld. It will be also discussed how the presence of torsion affects the ``navigableness'' of the wormhole for scalar and spinning particles. It will be shown that the wormhole with torsion may act as ``geometrical filter'': A very large torsion may ``increase the traversability'' for scalars while acting as a ``polarizator'' on spinning particles. This may have interesting phenomenological consequences.