Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some Recent Developments on Kink Collisions and Related Topics   We review recent works on modeling of dynamics of kinks in 1+1 dimensional
$\phi^4$ theory and other related models, like sine-Gordon model or $\phi^6$
theory. We discuss how the spectral structure of small perturbations can affect
the dynamics of non-perturbative states, such as kinks or oscillons. We
describe different mechanisms, which may lead to the occurrence of the resonant
structure in the kink-antikink collisions. We explain the origin of the
radiation pressure mechanism, in particular, the appearance of the negative
radiation pressure in the $\phi^4$ and $\phi^6$ models. We also show that the
process of production of the kink-antikink pairs, induced by radiation is
chaotic.

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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: math
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The categories of this paper are: stat