The propagation of electromagnetic plane waves with negative phase velocity (NPV) is considered in Schwarzschild-(anti-)de Sitter spacetime. It is demonstrated that NPV propagation occurs in Schwarzschild-de Sitter spacetime at lower values of the cosmological constant than is the case for de Sitter spacetime. Furthermore, we report that neither is NPV propagation observed in Schwarzschild-anti-de Sitter spacetime, nor is it possible outside the event horizon of a Schwarzschild black hole.
EPL (Europhysics Letters)
- Pub Date:
- September 2005
- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- Typographical error in eq (34) of EPL version is corrected in arxiv version. Europhysics Letters (accepted for publication)