Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Spin Fluctuations as a Source of Long-Range Proximity Effects in
  Diffusive Ferromagnet-Superconductor Structures   We show that quantum spin fluctuations in inhomogeneous ferromagnets
drastically affect the Andreev reflection of electrons and holes at a
ferromagnet-superconductor interface. As a result a strong long-range proximity
effect appears, associated with electron-hole spin triplet correlations and
persisting on a lenght scale typical for non-magnetic materials, but
anomalously large for ferromagnets.

6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics