摘要
研究了一维非线性链孤立子的统计性质．引进平移模作为完备基，把系统作为无相互作用的孤立子（反孤立于）一声子组成的“理想气体”，采用巨正则系综计算了低温条件下系统的自由能密度．
We have studied statistical properties of solitons for nonlinear one-dimensional chain.By in-treducing the translation medes which provide a complete set of functions ,we transform this system into anideal gas that consists of solitons(antisolitions)and phonons,and use grand canonical ensembIe to calculatethe free energy density at low temperature approximation.
出处
《山东师范大学学报（自然科学版）》
CAS
1994年第3期28-32,共5页
Journal of Shandong Normal University(Natural Science)
关键词
非线性链
孤立子
平移模
声子
自由能
统计
nonlinear one- dimensional chain
soliton(antisolitinitions)
translation modes
phonon
