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Kundt spacetime

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In mathematical physics, Kundt spacetimes are Lorentzian manifolds admitting a geodesic null congruence with vanishing optical scalars (expansion, twist and shear). A well known member of Kundt class is pp-wave. Ricci-flat Kundt spacetimes in arbitrary dimension are algebraically special. In four dimensions Ricci-flat Kundt metrics of Petrov type III and N are completely known.[1] All VSI spacetimes belong to a subset of the Kundt spacetimes.[2]

References

  1. ^ H. Stephani et. al, Exact solutions of Einstein's field equations, 2nd Edition, Cambridge Univ. Press 2003 (Kundt spacetimes are studied in Chapter 31)
  2. ^ Pravda, V.; Pravdova, A.; Coley, A.; Milson, R. (2002), "All spacetimes with vanishing curvature invariants", Classical and Quantum Gravity, 19 (23): 6213, arXiv:gr-qc/0209024, Bibcode:2002CQGra..19.6213P, doi:10.1088/0264-9381/19/23/318.


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