Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The study of spin-spin correlations in quasi-one-dimensional Heisenberg
  antiferromagnetic clusters   For a class of quasi-one-dimensional clusters, by using exact
diagonalization, we study the effect of side spins on the spin-spin
correlations on chain. Our calculations show that the side spins added in the
same sublattice can effectively strengthen the spin-spin correlations in large
distance region and make the change tend to flat. It is exactly proved that
periodically adding side spins can set up magnetic long-range orders in the
ground state. Also we investigate the effect of the density of side spins on
correlation strength. The case that two sublattices have different localized
spins is discussed.

2
The categories of this paper are: math
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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The categories of this paper are: eess