Phys. Rev. D 67, 104020 (2003) [4 pages]Generalizations of pp-wave spacetimes in higher dimensionsReceived 13 December 2002; published 22 May 2003 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.67.104020
DOI:
10.1103/PhysRevD.67.104020
PACS:
04.50.+h, 04.30.-w
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