Comment on "Energy Velocity of Diffusion Waves in Strongly Scattering Media"
C. M. Soukoulis, K. Busch, M. Kafesaki, E. N. Economou
Abstract
A comment on the recently published article (PRL 79, 3166 (1997)) is given. The issue is if there is a unique self-consistent way in determining the effective medium in a random medium. The recently introduced effective medium theory (PRL 75, 3442 (1995)) based on the principle of energy density homogenization is also discussed.
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