利用离散方法讨论了带有2个幂次非线性项的Schrodinger方程的4个差分格式,得出了保持电荷守恒和隐式能量守恒以及这些格式的截断误差.最后,通过数值例子验证了算法的有效性.
Four finite difference schemes are discussed by discrete methods for a kind of Schrodinger equation with two power-law nonlinear terms. The schemes preserve charge and implicit energy conservation laws exactly. And their numerical errors are estimated. Lastly, numerical tests show that the constructed schemes are efficient.