The aim of the present paper is two-fold. First we describe the Lagrangian dynamics of a recently proposed new class of lightlike p-branes and their interactions with bulk space-time gravity and electromagnetism in a self-consistent manner. Next, we discuss the role of lightlike branes as natural candidates for wormhole "throats" and exemplify the latter by presenting an explicit construction of a new type of asymmetric wormhole solution where the lightlike brane connects a "right" universe with Reissner-Nordstroem geometry to a "left" Bertotti-Robinson universe with two compactified space dimensions.
@article{arxiv.0912.3712,
title = {Space-Time Compactification Induced By Lightlike Branes},
author = {Eduardo Guendelman and Alexander Kaganovich and Emil Nissimov and Svetlana Pacheva},
journal= {arXiv preprint arXiv:0912.3712},
year = {2010}
}