Gravitation and Electromagnetic Wave Propagation with Negative Phase Velocity
arXiv:physics/0410265 · doi:10.1088/1367-2630/7/1/075
Abstract
Gravitation has interesting consequences for plane wave propagation in a vacuum. The propagation of plane waves with phase velocity directed opposite to the the time-averaged Poynting vector is investigated for a generally curved spacetime. Conditions for such negative-phase-velocity (NPV) propagation are established in terms of the metric components for general and special cases. The negative energy density implications of NPV propagation are discussed.
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