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29 March 2024
 
  » 1018993

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Nariai--Bertotti--Robinson spacetimes as a building material for one-way wormholes with horizons, but without singularity
Nikolai V. Mitskievich ; Maria G. Medina Guevara ; Hector Vargas Rodriguez ;
Date 21 Jul 2007
AbstractWe discuss the problem of wormholes from the viewpoint of gluing together two Reissner--Nordstr"om-type universes while putting between them a segment of the Nariai-type world (in both cases there are also present electromagnetic fields as well as the cosmological constant). Such a toy wormhole represents an example of one-way topological communication free from causal paradoxes, though involving a travel to next spacetime sheet since one has to cross at least a pair of horizons through which the spacetimes’ junction occurs. We also consider the use of thin shells in these constructions. Such a ``material’’ for wormholes we choose taking into account specific properties of the Nariai--Bertotti--Robinson spacetimes.
Source arXiv, 0707.3193
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