Based on LLP canonical transformation, a different polaron ground-state which includes the two-phonon correlation is adopted to calculate the ground-state energy of coulomb bound magnetopolaron.

• 摘要在LLP正则变换基础之上，引入线性组合算符，选取一个包含双声子关联效应的基态计算库仑束缚磁极化子的基态能量。