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抛物线性限制势量子点量子比特及其光学声子效应
引用本文:王子武,肖景林.抛物线性限制势量子点量子比特及其光学声子效应[J].物理学报,2007,56(2):678-682.
作者姓名:王子武  肖景林
作者单位:内蒙古民族大学物理与机电学院,通辽 028043
摘    要:在抛物量子点中电子与体纵光学声子强耦合的条件下,应用Peaker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本征波函数.量子点中这样的二能级体系可作为一个量子比特.当电子处于基态和第一激发态的叠加态时,计算出电子在空间的概率分布作周期性振荡.并且得出了振荡周期随受限长度及耦合强度的变化关系. 关键词: 量子点 量子信息 量子比特

关 键 词:量子点  量子信息  量子比特
文章编号:1000-3290/2007/56(02)/0678-05
收稿时间:2006-05-30
修稿时间:05 30 2006 12:00AM

Parabolic linear bound potential quantum dot qubit and its optical phonon effect
Wang Zi-Wu,Xiao Jing-Lin.Parabolic linear bound potential quantum dot qubit and its optical phonon effect[J].Acta Physica Sinica,2007,56(2):678-682.
Authors:Wang Zi-Wu  Xiao Jing-Lin
Institution:Depanment of Physics and Electromechanics, Inner Mongolia National Unovenity , Tongliao 028043, China
Abstract:On the condition of electric-LO phonon strong coupling in parabolic quantum dot, we obtain the eigenenergy and the eigenfuctions of the ground state and the first excited state by using variational method of Peakar type. This system in quantum dot may be employed as a two-level quantum system-qubit. When the electron is in the superposition state of the ground state and the first excited state, we obtain the time evolution of the electron density. It is shown that the period of oscillation decreases with the strength of coupling increasing when the confined length is constant. And the period of oscillation increases with the confined length increasing when the strength coupling is constant.
Keywords:quantum dot  quantum information  qubit
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