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

J4 ›› 2012, Vol. 29 ›› Issue (5): 602-608.

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

陈英杰¹,肖景林²

1曲阜师范大学物理工程学院, 山东曲阜 273165；
2内蒙古民族大学物理与电子信息学院, 内蒙古通辽 028043

收稿日期:2011-09-22 修回日期:2011-11-02 出版日期:2012-09-28 发布日期:2012-09-02
通讯作者: 陈英杰（1974-），女，山东乐陵人，硕士，讲师，主要从事量子通讯与量子计算方面的研究工作。 E-mail:sdchenyingjie@126.com
基金资助:
Research Founds from Qufu Normal University (XJZ200839)

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

CHEN Ying-Jie¹, XIAO Jing-Lin²

1 College of Physics and Engineering, Qufu Normal University, Qufu 273165, China;
2 College of Physics and Electronic Information, Inner Mongolia National University, Tongliao 028043, China

Received:2011-09-22 Revised:2011-11-02 Published:2012-09-28 Online:2012-09-02

摘要/Abstract

摘要：

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。

关键词: 量子光学, 库仑场, Pekar变分法, 量子点, 量子比特

Abstract:

The Coulomb bound potential effects on the parabolic linear bound potential quantum dot qubit have been studied under the condition of electric-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 the electron in the superposition state of the ground state and the first-excited state with the Coulomb binding parameter, the confinement length and the electron-LO-phonon coupling strength, respectively.

Key words: quantum optics, coulomb bound potential, variational method of Pekar type, quantum dot, qubit

中图分类号:

O431.2

陈英杰肖景林. 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[J]. J4, 2012, 29(5): 602-608.

CHEN Ying-Jie, XIAO Jing-Lin. Influences of Coulomb field on probability density of parabolic linear bound potential quantum dot qubit[J]. J4, 2012, 29(5): 602-608.

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