摘要
研究了磁场中二维有限深抛物形量子点中双电子在总自旋分别为 S=0或 S=1时的电子态 ,在有效质量近似下 ,利用精确的对角化方法计算了系统的能级结构 .发现系统的基态总自旋 S可以通过改变磁场的大小进行调制 ,由此可以设计利用 S=0和
The electronic structure of a two electron two dimensional quantum dot confined by a finite depth parabolic potential is investigated with different total spin S =0,1 in a magnetic field.Energy levels are calculated by means of exact diagonalization method in the frame work of effective mass approximation.It is found that the total spin of ground state of this system could be modulated by changing the magnitude of the magnetic field,which means the two spin states with S =0,1 of a two electron two dimensional quantum dot confined by a finite height parabolic potential can be used to construct a quantum bit.
基金
国家自然科学基金 (批准号 :10 1740 76)
国家重点基础研究专项经费 (批准号 :G2 0 0 1CB3 0 95 0 0 )资助项目~~
