Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Localization of spinwaves in the quantum Hall ferromagnet   The quantum Hall ferromagnet at filling fraction $\nu = 1$ has some unusual
properties due to the remarkable identity between the topological density of a
spin distortion and the associated electrical charge density. We investigate
the localization of spinwaves by coupling to a scalar disorder potential via
their topological density. A low energy description of the system in terms of a
non-linear sigma model of unitary supermatrices is derived. All states of this
model are localized in two dimensions. A possible experimental signature of
these effects in photo-luminescence is suggested.

24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
1
The categories of this paper are: cs
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess