Discrete breather and its stability in a general discrete nonlinear Schrodinger equation with disorder

作者：Bai Xiao Dong; Xue Ju Kui

来源：Physical Review E, 2012, 86(6): 066605.

DOI：10.1103/PhysRevE.86.066605

By considering a general discrete nonlinear Schrodinger model with arbitrary values of nonlinearity power and disorder, the existence and stability of a discrete breather (DB) in a general nonlinear lattice are discussed. It is found that nonlinearity and disorder play important roles in determining the existence and stability of the DB. Nonlinearity (expressed by the interparticle interaction) and disorder can enhance the stability of the DB. Remarkably, we find that the DB is most stable when the nonlinearity power is equal to a critical value. The effects of nonlinearity, nonlinearity power, and disorder on the stability of the DB are strongly coupled. DOI: 10.1103/PhysRevE.86.066605

• 出版日期2012-12-26
• 单位西北师范大学