Different kinds of discrete breathers in a Sine-Gordon lattice |
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Authors: | Bin-bin Lü Yan-ping Deng Qiang Tian |
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Affiliation: | Bin-bin L(U),Yan-ping DENG,Qiang TIAN |
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Abstract: | We study a one-dimensional Sine-Gordon lattice of anharmonic oscillators with cubic and quartic nearest-neighbor interactions, in which discrete breathers can be explicitly constructed by an exact separation of their time and space dependence. DBs can stably exist in the one-dimensional Sine-Gordon lattice no matter whether the nonlinear interaction is cubic or quartic. When a parametric driving term is introduced in the factor multiplying the harmonic part of the on-site potential of the system, we can obtain the stable quasiperiodic discrete breathers and chaotic discrete breathers by changing the amplitude of the driver. |
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