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Statistics of level spacing of geometric resonances in random binary composites

Y. Gu·K. W. Yu·Z. R. Yang
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Abstract

We study the statistics of level spacing of geometric resonances in the disordered binary networks. For a definite concentration $p$ within the interval $[0.2,0.7]$, numerical calculations indicate that the unfolded level spacing distribution $P(t)$ and level number variance $Σ^2(L)$ have the general features. It is also shown that the short-range fluctuation $P(t)$ and long-range spectral correlation $Σ^2(L)$ lie between the profiles of the Poisson ensemble and Gaussion orthogonal ensemble (GOE). At the percolation threshold $p_c$, crossover behavior of functions $P(t)$ and $% Σ^2(L)$ is obtained, giving the finite size scaling of mean level spacing $δ$ and mean level number $n$, which obey the scaling laws, $% δ=1.032 L ^{-1.952} $ and $n=0.911L^{1.970}$.

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Y. Gu, K. W. Yu, Z. R. Yang. 2001-11-13. Statistics of level spacing of geometric resonances in random binary composites. https://doi.org/10.1103/physreve.65.046129

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