Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum correlations from Brownian diffusion of chaotic level-spacings   Quantum chaos is linked to Brownian diffusion of the underlying quantum
energy level-spacing sequences. The level-spacings viewed as functions of their
order execute random walks which imply uncorrelated random increments of the
level-spacings while the integrability to chaos transition becomes a change
from Poisson to Gauss statistics for the level-spacing increments. This
universal nature of quantum chaotic spectral correlations is numerically
demonstrated for eigenvalues from random tight binding lattices and for zeros
of the Riemann zeta function.

27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
16
The categories of this paper are: stat