Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bloch Walls and Macroscopic String States in Bethe's solution of the
  Heisenberg Ferromagnetic Linear Chain   We present a calculation of the lowest excited states of the Heisenberg
ferromagnet in 1-d for any wave vector. These turn out to be string solutions
of Bethe's equations with a macroscopic number of particles in them. These are
identified as generalized quantum Bloch wall states, and a simple physical
picture provided for the same.

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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: physics
0
The categories of this paper are: hep-ph
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The categories of this paper are: econ
25
The categories of this paper are: patt-sol
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The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn