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一维β-Fermi-Pasta-Ulam纳米单原子链中非线性参数作用的研究

Effect of nonlinear parameters in one-dimensional β-Fermi-Pasta-Ulam nanochain
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摘要 运用发展的Ford-Kac-Mazur方法对一维β-Fermi-Pasta-Ulam纳米单原子链的运动方程进行了简化.通过数值计算,对系统在非线性相互作用下的傅里叶热传输定律进行了修正,同时对奇偶原子数晶格系统的局域能量密度进行了比较,发现奇数原子系统中明显存在离散呼吸子. The motion equation β-Fermi-Pasta-Ulam nanochain was simplified into an one-dimensional by using extended Ford,Kac and Mazur（FKM）formation.Based on numerical calculations,the law of Fourier for heat conductivity of the system was modified.Meanwhile,by comparing the different local energy densities in the lattices of odd-even size system,it is discovered that discrete breathers obviously exist in the odd chain.
作者 赵华 易林
机构地区 上海电机学院数理研究所 华中科技大学物理学院
出处 《上海理工大学学报》 CAS 北大核心 2010年第4期351-354,共4页 Journal of University of Shanghai For Science and Technology
基金 国家自然科学基金资助项目(10804071) 上海市高校选拔培养优秀青年教师科研专项基金资助项目(sdj-07014) 上海电机学院优秀青年教师培养资助项目(07C316)
关键词 热传导 量子传输 呼吸子 heat conduction quantum transport discrete breathers
分类号 O551 [理学—热学与物质分子运动论]
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参考文献19

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上海理工大学学报
2010年 第4期

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