Structure of Eigenstates and Local Spectral Density of States: A Three-Orbital Schematic Shell Model

Details Structure of Eigenstates and Local Spectral Density of States: A Three-Orbital Schematic Shell Model Structure of Eigenstates and Local Spectral Density of States: A Three-Orbital Schematic Shell Model

1997-08-26

arxiv.org/abs/chao-dyn/9708020v1

Nonlinear Sciences

Chaotic Dynamics

12 pages in RevTex and 15 Postscript figures

Scientific paper

10.1103/PhysRevE.57.323

The average shape of the Spectral Local Density of States (LDOS) and eigenfunctions (EFs) has been studied numerically for a conservative dynamical model (three-orbital Lipkin-Meshkov-Glick model) which can exhibit strong chaos in the classical limit. The attention is paid to the comparison of the shape of LDOS with that known for random matrix models, as well as to the shape of the EFs, for different values of the perturbation strength. The classical counterparts of the LDOS has also been studied and found in a remarkable agreement with the quantum calculations. Finally, by making use of a generalization of Brillouin- Wigner perturbation expansion, the form of long tails of LDOS and EFs is given analytically and confirmed numerically.

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