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采用Ｌａｒｓｅｎ谐振子算符代数运算与变分微扰相结合的方法，研究处于电磁场中量子阱内电子—体纵光学声子耦合系统的性质的温度依赖性，得到了有限温度下系统的自能．对ＧａＡｓ晶体的量子阱进行数值计算，结果表明，极化子的自能随阱宽及电场强度的增大而减小，随温度的升高而增大．当磁场强度Ｂ＜５１．５７Ｔ时，极化子的自能随磁场强度的增大而增大，当Ｂ＞５１．５７Ｔ时，极化子的自能随磁场强度的增大而减小．当Ｂ＝５１．５７Ｔ时，极化子的自能出现极值，相应的共振频率为ωｃ＝２．５８２５ω
The temperature dependency of the electron-body longitudinal optical-phonon coupling system in the quantum well in electromagnetic field was studied by combining the Larsen harmonic operator algebraic operation with the variational perturbation. The self-energy of the system at finite temperature . The quantum well of GaAs crystal is numerically calculated. The results show that the self-energy of the polaron decreases with the increase of well width and electric field strength, and increases with increasing temperature. When the magnetic field strength B <51.57T, the self-energy of the polaron increases with the increase of the magnetic field strength. When B> 51.57T, the self-energy of the polaron decreases with the increase of the magnetic field strength. When B = 51.57T, the polaron self-energy appears extreme, the corresponding resonant frequency ωc = 2.5825ω