Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rectification Effect on Solitary Waves in the Symmetric Y-shaped
  Granular Chain   The rectification effect on the propagation of solitary waves in the
symmetric Y-shaped granular chain is numerically investigated in this Letter. A
heterojunction with mass mismatch occurs at the position of Y-junction by
adjusting the branch angle. And the heavy-light heterojunction is more
favorable for the solitary wave passing. The energy rectification efficiency
can be improved by adjusting the branch angle and the direction of incident
solitary wave. The results have particularly practical significance for the
potential design of acoustic diode devices.

28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg