Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polychromatic Optical Bloch Oscillations   Bloch oscillations (BOs) of polychromatic beams in circularly-curved optical
waveguide arrays are smeared out owing to the dependence of the BO spatial
period on wavelength. Here it is shown that restoring of the self-imaging
property of the array and approximate BOs over relatively broad spectral ranges
can be achieved by insertion of suitable lumped phase slips uniformly applied
across the array.

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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
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The categories of this paper are: bayes-an