Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Folded Spin-1/2 XXZ Model: I. Diagonalisation, Jamming, and Ground
  State Properties   We study an effective Hamiltonian generating time evolution of states on
intermediate time scales in the strong-coupling limit of the spin-1/2 XXZ
model. To leading order, it describes an integrable model with local
interactions. We solve it completely by means of a coordinate Bethe Ansatz that
manifestly breaks the translational symmetry. We demonstrate the existence of
exponentially many jammed states and estimate their stability under the leading
correction to the effective Hamiltonian. Some ground state properties of the
model are discussed.

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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom