Consistently with the Einstein equivalence principle and using an electromagnetic formulation first suggested by Tamm, we show that a local observer cannot observe negative-phase-velocity (NPV) propagation of electromagnetic waves in vacuum, whereas a global observer can appreciate that phenomenon. Using the specific example of the Kerr metric, we also demonstrate the possibility of NPV propagation within the ergosphere of a rotating black hole.
|Original language||English (US)|
|Number of pages||8|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|State||Published - Mar 7 2005|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)