3 citations · 9 across the 7 of their papers we have counts for
4 papers · 1 filter
Who's afraid of a negative lapse?
Robert Beig, Piotr T. Chruściel, Wan Cong
We rederive the Arnowitt-Deser-Misner equations in a framework in which the zeros of the lapse are innocuous, whether with or without changes of sign. We further develop and analys…
Elastically induced phase-shift and birefringence in optical fibers
Elisabeth Steininger, Thomas Mieling, Piotr T. Chruściel
We compute how elastic deformations of optical fibers affect light propagation therein. Specifically, we consider differences in wave-guiding properties of straight fibers subject…
Thomas-Wigner rotation via Clifford algebras
Piotr T. Chruściel, Helmuth Urbantke
We derive Macfarlane's formula for the Thomas-Wigner angle of rotation using Clifford-algebra methods. The presentation is pedagogical and elementary, suitable for students with so…
Kerr-AdS type higher dimensional black holes with non-spherical cross-sections of horizons
Piotr T. Chruściel, Wan Cong, Finnian Gray
We construct, in even spacetime dimensions, a family of singularity-free Kerr-Anti-de Sitter-like black holes with negatively curved cross-sections of conformal infinity and non-sp…