Abstract
We investigate D-dimensional Lorentzian spacetimes in which all of the scalar invariants constructed from the Riemann tensor and its covariant derivatives are zero. These spacetimes are higher-dimensional generalizations of D-dimensional pp-wave spacetimes, which have been of interest recently in the context of string theory in curved backgrounds in higher dimensions.
- Received 13 December 2002
DOI:https://doi.org/10.1103/PhysRevD.67.104020
©2003 American Physical Society
