 0150 NAJAR Hatem
 Lifshitz tails for random acoustic operators
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Feb 2, 01

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Abstract. Using techniques developed in [Kp1], we prove that
the integrated density of states of $A_{\omega}=\nabla\frac{1}{\varrho_{\omega}}\nabla$ has
Lifshitz behavior in the neighborhood of the internal spectral
gaps if and only if the integrated density of states of some periodic operator
is non degenerated on the same edge of the spectral gaps.\\ From this result we obtain the initial estimates necessary for deducing localization near
non degenerate band edges.
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