一维分子晶体模型中立方型相互作用引起的孤子激发

SOLITON EXCITATION OF A ONE-DIMENSIONAL MOLECULAR-CRYSTAL MODEL WITH A CUBIC INTERACTION TERM

得到考虑了立方型相互作用后的一维分子晶体模型的孤子激发的运动解.在忽略了三次项的近似下,孤子激发的运动解回复于通常的极化子解.计算了孤子激发的峰宽和峰值.并指出了孤子激发与通常极化子解的差别.

A moving solution for soliton excitation of a one-dimensional molecular-crystal model with a cubic interaction term is found.Under the approximation for neglecting the cubic interaction term,the moving solution tends to the usual polaron solution.The width and the peak are calculated also.Differences between the soliton excitation in the model and the usual polaron solution are pointed out.