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Abstract
The possible discrete breathers are obtained numerically in the system of one-dimensional mixed Klein-Gordon/Fermi-Pasta-Ulam chain on the basis of simplified motion equations by using extended rotating plane wave approximation. Furthermore，the effect of each nonlinear parameter on the static，first-order harmonic and second-order harmonic components of the discrete breathers is investigated.

Keywords:
mixed Klein-Gordon/Fermi-Pasta-Ulam chain/

extended rotating plane wave approximation/

discrete breathers/

symmetry
Authors and contacts
Zhou Qian,

Lü Bin-Bin,

Tian Qiang

1.
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Vol. 58, Issue 1 - 2009-01-05

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