Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universality in Random Systems: the case of the 3-d Random Field Ising
  model   We study numerically the zero temperature Random Field Ising Model on cubic
lattices of various linear sizes $ 6 \le L \le 90 $ in three dimensions with
the purpose of verifying the validity of universality for disordered systems.
For each random field configuration we vary the ferromagnetic coupling strength
J and compute the ground state exactly.
  We examine the case of different random field probability distributions:
gaussian distribution, zero width bimodal distribution h_{i} = \pm 1, wide
bimodal distribution h_{i} = \pm 1 +\delta h (with a gaussian $\delta h$). We
also study the case of the randomly diluted antiferromagnet in a field,which is
thought to be in the same universality class.
  We find that in the infinite volume limit the magnetization is discontinuous
in J and we compute the relevant exponent, which, according to finite size
scaling, equals $ 1/ \nu $ . We find different values of $ \nu $ for the
different random field distributions, in disagreement with universality.

34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an