Exact Piecewise Flat Gravitational Waves
arXiv:1106.5380 · doi:10.1088/0264-9381/28/24/245006
Abstract
We generalize our previous linear result [1] in obtaining gravitational waves from our piecewise flat model for gravity in 3+1 dimensions to exact piecewise flat configurations describing exact planar gravitational waves. We show explicitly how to construct a piecewise flat spacetime that describes an impulsive plane wavefront. From these wavefronts more general plane waves may be constructed.