Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical properties of S=1 bond-alternating Heisenberg chains at finite
  temperatures   Dynamical structure factors of the S=1 bond-alternating spin chains in the
dimer phase are calculated at finite temperature, using the pair dynamical
correlated-effective-field approximation. At T=0, the delta-function-type peak
of the one-magnon mode appears. When temperature is increased, such a sharp
peak is broadened and the additional weak peak caused by the excitation from
the triplet state to the quintet state emerges in the higher energy region. The
results are discussed in comparison with those obtained by the exact
diagonalization method.

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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
6
The categories of this paper are: astro-ph