Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multifrequency and edge breathers in the discrete sine-Gordon system via
  subharmonic driving: theory, computation and experiment   We consider a chain of torsionally-coupled, planar pendula shaken
horizontally by an external sinusoidal driver. It has been known that in such a
system, theoretically modeled by the discrete sine-Gordon equation, intrinsic
localized modes, also known as discrete breathers, can exist. Recently, the
existence of multifrequency breathers via subharmonic driving has been
theoretically proposed and numerically illustrated by Xu {\em et al.} in Phys.
Rev. E {\bf 90}, 042921 (2014). In this paper, we verify this prediction
experimentally. Comparison of the experimental results to numerical simulations
with realistic system parameters (including a Floquet stability analysis), and
wherever possible to analytical results (e.g. for the subharmonic response of
the single driven-damped pendulum), yields good agreement. Finally, we report
on period-1 and multifrequency edge breathers which are localized at the open
boundaries of the chain, for which we have again found good agreement between
experiments and numerical computations

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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
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The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
3
The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
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The categories of this paper are: acc-phys