| Periodic,quasiperiodic, and chaotic breathers in two-dimensional discrete β-Fermi-Pasta-Ulam lattice |
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| 引用本文： | 徐权,田强.Periodic,quasiperiodic, and chaotic breathers in two-dimensional discrete β-Fermi-Pasta-Ulam lattice[J].中国物理 B,2013(8):539-541. |
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| 作者姓名： | 徐权 田强 |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Grant No. 11247255） and the Natural Science Foundation of Heilongjiang Province, China （Grant No. A200506）. |
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| 摘 要： | Using numerical method, we investigate whether periodic, quasiperiodic, and chaotic breathers are supported by the two-dimensional discrete Fermi-Pasta-Ulam (FPU) lattice with linear dispersion term. The spatial profile and time evolution of the two-dimensional discrete β -FPU lattice are segregated by the method of separation of variables, and the numerical simulations suggest that the discrete breathers (DBs) are supported by the system. By introducing a periodic interaction into the linear interaction between the atoms, we achieve the coupling of two incommensurate frequencies for a single DB, and the numerical simulations suggest that the quasiperiodic and chaotic breathers are supported by the system, too.
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| 关 键 词： | 二维离散 准周期 呼吸 晶格 面食 费米 数值计算方法 数值模拟 |
Periodic, quasiperiodic, and chaotic breathers in two-dimensional discrete-Fermi-Pasta-Ulam lattice |
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| Xu Quan and Tian Qiang.Periodic, quasiperiodic, and chaotic breathers in two-dimensional discrete-Fermi-Pasta-Ulam lattice[J].Chinese Physics B,2013(8):539-541. |
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| Authors: | Xu Quan and Tian Qiang |
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| Institution: | [1]Department of Physics, Daqing Normal University, Daqing 163712, China [2]Department of Physics, Beijing Normal University, Beijing 100875, China |
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| Abstract: | breather, quasiperiodic breather, chaotic breather |
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| Keywords: | breather quasiperiodic breather chaotic breather |
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