Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Level statistics and localization in a 2D quantum percolation problem   A two dimensional model for quantum percolation with variable tunneling range
is studied. For this purpose the Lifshitz model is considered where the
disorder enters the Hamiltonian via the nondiagonal elements. We employ a
numerical method to analyze the level statistics of this model. It turns out
that the level repulsion is strongest around the percolation threshold. As we
go away from the maximum level repulsion a crossover from a GOE type behavior
to a Poisson like distribution is indicated. The localization properties are
calculated by using the sensitivity to boundary conditions and we find a strong
crossover from localized to delocalized states.

34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn