摘要
用精确对角化的方法研究了处于外磁场中的N层单电子垂直耦合量子点系统,计算了基态跃迁随外磁场的变化关系.结果表明量子点与量子点之间的距离和电子与电子之间的相互作用对耦合量子点的低激发态有比较大的影响,在强耦合情况下基态会随着外磁场的增大出现不连续跃迁,而在弱耦合情况下就不会产生基态跃迁,角动量为零的态始终为基态.
A method is proposed to exactly diagonalize the Hamiltonian of a N-layer quantum dot containing a single electron in each dot in arbitrary magnetic fields. The energy spectra of the dot are calculated as a function of the applied magnetic field. We find disco-ntinuous ground-state energy transitions are induced by an external magnetic field in the case of strong coupling. However, in the case of weak coupling, such a transition does not occur and the angular momentum remains zero.
出处
《河南大学学报（自然科学版）》
CAS
北大核心
2008年第2期139-142,共4页
Journal of Henan University:Natural Science
基金
河南省基础与前沿技术研究计划项目(072300410380)
关键词
耦合量子点
基态跃迁
少体物理
coupled quantum dot
ground-state-transition
few-body physics
