Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermodynamic Bethe Ansatz for the Spin-1/2 Staggered XXZ- Model   We develop the technique of Thermodynamic Bethe Ansatz to investigate the
ground state and the spectrum in the thermodynamic limit of the staggered $XXZ$
models proposed recently as an example of integrable ladder model. This model
appeared due to staggered inhomogeneity of the anisotropy parameter $\Delta$
and the staggered shift of the spectral parameter. We give the structure of
ground states and lowest lying excitations in two different phases which occur
at zero temperature.

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The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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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: plasm-ph
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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin