Level-spacing statistics and spectral correlations in diffuse van der Waals clusters
Level-spacing statistics and spectral correlations in diffuse van der Waals clusters
We present a statistical analysis of eigenenergies and discuss several measures of spectral fluctuations and spectral correlations for the van der Waals clusters of different sizes. We show that the clusters become more and more complex with increase in cluster size. We study nearest-neighbor level-spacing distribution $P(s)$, the level number …