Dark Solitons in FPU Lattice Chain |
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| Authors: | WANG Deng-Long YANG Ru-Shu YANG You-Tian |
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| Affiliation: | 1. Department of Physics and Key Laboratory of Low Dimensional Materials & Application Technology of Ministry of Education, Xiangtan University, Xiangtan 411105, China;2. Department of Electric Engineering, Hunan University of Arts and Science, Changde 415000, China |
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| Abstract: | Based on multiple scales method, we study the nonlinear properties of a new Fermi-Pasta-Ulam lattice model analytically. It is found that the lattice chain exhibits a novel nonlinear elementary excitation, i.e. a dark soliton. Moreover, the modulation depth of dark soliton is increasing as the anharmonic parameter increases. |
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| Keywords: | FPU lattice chain a dark soliton the multiple-scale method |
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