Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the origin of order from random two-body interactions   We investigate the origin of order in the low-lying spectra of many-body
systems with random two-body interactions. Contrary to the common belief our
study based both on analytical as well as on numerical arguments shows that
these are the higher $J$-sectors whose ground states are more orderly than the
ones in the J=0-sector. A predominance of J=0 ground states turns out to be the
result of putting on together states with different characteristic energy
scales from different $J$-sectors.

7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol