Periodic, Quasiperiodic and Chaotic Discrete Breathers in a Parametrical Driven Two-Dimensional Discrete Klein-Gordon Lattice |
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Authors: | XU Quan TIAN Qiang |
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Institution: | Department of Physics, Daqing Normal University, Daqing 163712Department of Physics, Beijing Normal University, Beijing 100875 |
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Abstract: | We study a two-dimensional lattice of anharmonic oscillators with only 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 two-dimensional Klein-Gordon lattice with hard on-site potential. 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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Keywords: | 05 45 Pq 05 45 Xt 02 30 Jr 63 20 Pw 63 20 Ry |
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