1995/08/22 by R. D. Daniels, R.D. Daniels, G. M. Shore +1 · 1 citation
Mathematics · Physics and Astronomy · #Angular momentum #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #Black hole (networking) #Classical mechanics #Cosmology and Gravitation Theories #Curvature #Geometry #Gravitation #Gravitational field #Mathematics #Photon #Physics #Quantum #Quantum electrodynamics #Quantum field theory in curved spacetime #Quantum gravity #Quantum mechanics #Rotating black hole #Spacetime #Stationary spacetime #Superluminal motion #Theoretical physics #gr-qc #hep-th
paper · pdf · doi:10.1016/0370-2693(95)01468-3
published as Phys.Lett. B367 (1996) 75-83 · Plain TeX, 12 pages, 1 figure
arxiv created 1995/08/22 · openalex publication_date 1996/01/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The effective action for QED in curved spacetime includes equivalence principle violating interactions between the electromagnetic field and the spacetime curvature. These interactions admit the possibility of superluminal yet causal photon propagation in gravitational fields. In this paper, we extend our analysis of photon propagation in gravitational backgrounds to the Kerr spacetime describing a rotating black hole. The results support two general theorems -- a polarisation sum rule and a `horizon theorem'. The implications for the stationary limit surface bounding the ergosphere are also discussed.