有不少的极性晶体，电子与体纵光学声子的耦合弱，但与表面光学声予的耦合强。
There is a weak bulk coupling but a strong surface coupling between the electrons and phonon for many polar crystals.
论文第二章研究了等离子体中横向扰动下的(3 + 1)维弱非线性离子声波，得到了描述离子声孤波的(3 + 1)维kp方程。
In chapter two, the (3 + 1) dimensional weakly nonlinear ion acoustic wave at higher order transverse perturbations in plasma was discussed and described by the Kadomtsev-Petviashvili (KP) equation.
在声子色散影响下利用压缩态变分法计算了抛物量子点中弱耦合极化子的基态能量。
The ground state energy of weak-coupling polaron in a parabolic quantum dot considering the phonon dispersion is calculated using the squeezed-state variational approach.
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