库仑场对抛物线性限制势二能级系统量子点量子比特概率密度的影响(英文)

Influences of Coulomb field on probability density of parabolic linear bound potential quantum dot qubit

在抛物量子点中电子与体纵光学声子强耦合且在库仑场束缚条件下,应用Pekar变分方法,得出了电子的基态和第一激发态的本征能量及基态和第一激发态的本征波函数。以量子点中这样的二能级体系作为一个量子比特。当电子处于基态和第一激发态的叠加态时,计算出电子在时空中作周期性振荡的概率分布。并且得出了概率分布与库仑场、耦合强度、受限强度的变化关系。

The Coulomb bound potential effects on the parabolic linear bound potential quantum dot qubit were studied under the condition of electron-LO-phonon strong coupling using the variational method of Pekar type. The numerical results lead us to formulate the derivative relationship of the probability density of electron in superposition state of the ground state and first-excited state with the Coulomb binding parameter, confinement length and electron-LO-phonon coupling strength, respectively