中文摘要：

通过求解柱形量子点的能量本征方程,得到极化子的基态和第一激发态的本征能量以及本征波函数,进而根据基态和第一激发态构造一个量子比特。数值计算讨论了消相干时间与色散系数、电子-体纵光学声子耦合强度、柱形量子点的半径及柱高的变化关系。

英文摘要：

The eigen energy and eigen function of the ground state and the first excited state of the polaron in cylindrical quantum dot were obtained by precisely solving the Schrdinger equation.A qubit was formed by overlying both the ground state and the first excited state.Numerical results indicate that decoherence time changes with coefficient of dispersion,electron-LOphonon coupling strength,the radius and height of cylindrical quantum dot.