Two-vibron bound states in the β-Fermi-Pasta-Ulam model

作     者：胡新广 唐翌 

作者机构：Department of Physics Xiangtan University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2008年第17卷第11期

页      面：4268-4272页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project supported by the Key Project of Hunan Provincial Educational Department of China (Grant No 04A058) 

主　　题：discrete breathers Fermi-Pasta-Ulam model number state method two-vibron bound states 

摘      要：This paper studies the two-vibron bound states in the β- Fermi Pasta-Ulam model by means of the number conserving approximation combined with the number state method. The results indicate that on-site, adjacent-site and mixed two-vibron bound states may exist in the model. Specially, wave number has a significant effect on such bound states, which may be considered as the quantum effects of the localized states in quantum systems.