Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emergence of quantum chaos in finite interacting Fermi systems   We study the level spacing statistics P(s) in many-body Fermi systems and
determine a critical two-body interaction strength Uc at which a crossover from
Poisson to Wigner-Dyson statistics takes place. Near the Fermi level the
results allow to find a critical temperature Tch above which quantum chaos and
thermalization set in.

17
The categories of this paper are: q-fin
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys