Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dark Matter-Wave Solitons in Optical Lattices   We analyze the Floquet-Bloch matter-wave spectrum of Bose-Einstein
condensates loaded into single-periodic optical lattices and double-periodic
superlattices. In the framework of the Gross-Pitaevskii equation, we describe
the structure and analyze the mobility properties of dark matter-wave solitons
residing on the background of extended nonlinear Bloch-type states. We
demonstrate that interaction between dark solitons can be effectively
controlled in optical superlattices.

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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: cs