The effect of bound polaron on the thermodynamic properties of GaAs quantum dot (QD) with a quadratic potential in the presence of electromagnetic field is presented. The Schrödinger method as well as the canonical ensemble approach has been used to determine the energy of polaron and the thermodynamic properties such as heat capacity, entropy, and magnetic susceptibility with the help of canonical partition function. We found that the heat capacity increases with a potential confinement angle and also with temperature, and decreases with the increase in the magnetic field. This reduction in the heat capacity shows that our system behaves as a refrigerator. Furthermore, an increasing in magnetic field reduces the disorder in the quantum dot. Indeed, a strong increase in the magnetic field is much better for a good confinement of particles. Moreover, we found that the materials with low coupling constant avoid disorder in the quantum system. The polaron is therefore a good protector of the quantum dot against the external effects. We also found that an increasing temperature increases the speed of electrons and also for very small values of magnetic field, the system stores more energy. It is worthy to mention that our approach is consistent with the characteristic behavior of the diamagnetic materials, well-known as GaAs quantum dots.

提出了束缚极化子对存在电磁场的二次电势GaAs量子点（QD）热力学性质的影响。Schrödinger方法以及规范的集成方法已被用于借助规范分配函数确定极化子的能量和热力学性质，例如热容量，熵和磁化率。我们发现，热容随着势能限制角以及温度的增加而增加，并且随着磁场的增加而减少。热容量的减少表明我们的系统就像冰箱一样。此外，磁场的增加减少了量子点中的无序。实际上，磁场的强烈增加对于良好地限制颗粒要好得多。而且，我们发现具有低耦合常数的材料避免了量子系统中的无序。因此，极化子是量子点免受外部影响的良好保护剂。我们还发现，温度升高会提高电子的速度，并且对于非常小的磁场值，系统会存储更多的能量。值得一提的是，我们的方法与众所周知的GaAs量子点的抗磁性材料的特征行为保持一致。