Negative phase velocity of electromagnetic waves and the cosmological constant

Details Negative phase velocity of electromagnetic waves and the cosmological constant Negative phase velocity of electromagnetic waves and the cosmological constant

2004-11-29

arxiv.org/abs/astro-ph/0411754v2

Eur.Phys.J.C41S1:1-4,2005

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1140/epjcd/s2005-01-001-9

Examining the propagation of electromagnetic plane waves with the wavevector directed in opposition to the time-averaged Poynting vector in cosmological spacetime with piecewise uniform metric, we show that such negative-phase-velocity (NPV) propagation is possible in certain de Sitter spacetimes but not in anti-de Sitter spacetimes. This difference suggests the possibility of an optical/electromagnetic experiment to discern the cosmological constant of a four-dimensional universe stemming from a five-dimensional brane universe.

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