Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large N behavior of string solutions in the Heisenberg model   We investigate the large $N$ behavior of the complex solutions for the two
magnon system in the S=1/2 Heisenberg XXZ model. The Bethe ansatz equations are
numerically solved for the string solutions with new iteration method. A clear
evidence of the violation of the string configurations is found at
$N=22,62,121,200,299,417$, but the broken states are still Bethe states. The
number of the Bethe states is consistent with the exact diagonalization, except
one singular state.

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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
2
The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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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: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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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: nlin
6
The categories of this paper are: astro-ph