原子与分子物理学报2011，Vol.28Issue(6)：1095-1099,5.DOI:10.3969/j.issn.1000-0364.2011.06.019
球型量子点量子比特的声子退相干效应
The decoherence effect of phonon in qubit in spherical quantum dot
摘要
Abstract
The influence of phonon effect on the energy of polaron and the properties of a qubit in spherical quantum dot were studied by solving precisely the eigen-energy equation.LLP unitary transformation and variation method. The numerical results showed that the eigen-energy of the electron or polaron in spherical quantum dot decreased with increasing quantum dot radius and the quantum size effect was obvious. When the effect of phonon was taken into account, the eigen energy of the ground state and the first excited state were lowered, leading to oscillating period of qubit shorting and coherence of qubit weakening. The numerical results also indicated that the probability density distribution of electron or polaron in different space point in qubit was different and all did periodicity oscillating with same time period.关键词
球型量子点/量子比特/声子效应Key words
sphere quantum dot/qubit/phonon effect分类
数理科学引用本文复制引用
刘莎莎,赵翠兰..球型量子点量子比特的声子退相干效应[J].原子与分子物理学报,2011,28(6):1095-1099,5.基金项目
国家自然科学基金(10964005) （10964005）
内蒙古高等学校科研项目(NJzy08085) （NJzy08085）
