Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analytical Bethe ansatz for the open AdS/CFT SU(1|1) spin chain   We prove an inversion identity for the open AdS/CFT SU(1|1) quantum spin
chain which is exact for finite size. We use this identity, together with an
analytic ansatz, to determine the eigenvalues of the transfer matrix and the
corresponding Bethe ansatz equations. We also solve the closed chain by
algebraic Bethe ansatz.

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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: cs
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The categories of this paper are: physics
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The categories of this paper are: q-fin