Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A simple approach to the angular momentum distribution in the ground
  states of many-body systems   We propose a simple approach to predict the angular momentum I ground state
(I g.s.) probabilities of many-body systems that does not require the
diagonalization of hamiltonians with random interactions. This method is found
to be applicable to {\bf all} cases that have been discussed: even and odd
fermion systems (both in single-j and many-j shells), and boson (both sd and
sdg) systems. A simple relation for the highest angular momentum g.s.
probability is found. Furthermore, it is suggested for the first time that the
0g.s. dominance in boson systems and in even-fermion systems is given by
two-body interactions with specific features.

20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn