Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact solution of the open XXZ chain with general integrable boundary
  terms at roots of unity   We propose a Bethe-Ansatz-type solution of the open spin-1/2 integrable XXZ
quantum spin chain with general integrable boundary terms and bulk anisotropy
values i \pi/(p+1), where p is a positive integer. All six boundary parameters
are arbitrary, and need not satisfy any constraint. The solution is in terms of
generalized T - Q equations, having more than one Q function. We find numerical
evidence that this solution gives the complete set of 2^N transfer matrix
eigenvalues, where N is the number of spins.

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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: q-bio