摘要
采用龙格-库塔算法对激光与半导体双量子阱系统相互作用的密度矩阵方程进行数值求解,研究了不对称半导体双量子阱系统中电子布居转移的相干控制。研究表明,调节激光场强和脉冲时间延迟可控制两个下能级间的粒子数转移;利用激光场相对相位可精确地控制布居转移几率。这些结果在相干叠加态制备、量子纠缠和量子信息处理等领域具有潜在的应用价值。
By the Runge-Kutta algorithm, the density matrix equation, which describes the interaction between laser and quantum wells, is numerically solved and the coherent control of population transfer in asymmetric semiconductor double quantum wells is studied. It is shown that the population transfer between two lower states can be controlled by adjusting the laser intensity and time delay among laser pulses. The relative phase among laser fields can be used to exactly control the population transfer probability. These results have potential application value in the fields of coherent superposition state preparation, quantum entanglement, and quantum information processing, and so on.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2016年第9期282-287,共6页
Acta Optica Sinica
基金
上海市自然科学基金(13ZR1411700)
华东理工大学大学生创新项目(X14172)
关键词
量子光学
布居转移
量子阱
受激拉曼绝热通道
quantum optics
population transfer
quantum well
stimulated Raman adiabatic passage
