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Comparison of bound magneto-polaron in circular, elliptical, and triangular quantum dot qubit
Optical and Quantum Electronics ( IF 3 ) Pub Date : 2020-09-20 , DOI: 10.1007/s11082-020-02531-1
R. Khordad , H. R. Rastegar Sedehi

In the present work, we consider an electron which is strongly coupled to the LO-phonon in circular, elliptical, and triangular quantum dots with Coulomb impurity. The eigenenergies and eigenfunctions of the ground and the first-excited states of the electron are obtained under magnetic and electric fields by using the Pekar variational method. We have also obtained the Shannon entropy and the electron probability density. This system can be applied as a two-level qubit. The entropy shows the oscillatory periodic evolution as function of the time due to the form of the confinement. It is seen that entropy has an arrangement periodic behavior for the higher symmetry (circular quantum dot).



中文翻译:

圆形,椭圆形和三角形量子点量子位中束缚的磁极化子的比较

在当前的工作中,我们考虑一个电子,该电子在具有库仑杂质的圆形,椭圆形和三角形量子点中与LO声子牢固耦合。使用Pekar变分方法在磁场和电场的作用下获得了地面的本征能和本征函数以及电子的第一激发态。我们还获得了香农熵和电子概率密度。该系统可以用作两级量子比特。由于限制的形式,熵显示出振荡的周期性演化是时间的函数。可以看出,熵具有较高的对称性(圆形量子点)的周期性排列行为。

更新日期:2020-09-21
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