Variable-tension lightlike brane as a gravitational source of traversable Misner-Wheeler-type wormholes

Finally, we construct explicitly a traversable wormhole of Misner-Wheeler type based on a Reissner-Nordström geometry. This wormhole is constructed as a self-consistent solution of the electrically sourceless Einstein-Maxwell system in the D=4 bulk interacting with a LL-brane. The pertinent wormhole throat is located precisely at the LL-brane sitting on the outer Reissner-Nordström horizon with the Reissner-Nordström mass and charge being functions of the dynamical LL-brane tension.