无限深量子阱中弱耦合极化子的性质  

Properties of the Weak-coupling Polaron in Infinite Quantum Well

作　　者：李亚利[1] 

机构地区：[1]徐州师范大学物理与电子工程学院,江苏徐州221116

出　　处：《淮阴师范学院学报（自然科学版）》2009年第3期211-215,共5页Journal of Huaiyin Teachers College;Natural Science Edition

摘　　要：采用改进的线性组合算符和变分相结合的方法,导出了量子阱中弱耦合极化子的光学声子平均数和基态能量;讨论了阱宽对基态能量的影响以及Lagrange乘子u对光学声子平均数和基态能量的影响.数值计算结果表明:光学声子平均数随u的增加而增大;基态能量随u的增加而减小,随阱宽的增加而减小.The ground state energy and mean number of optical phonon of weak-coupling polaren in infinite quantum well in this article are to be examined by using improved linear-combination-operator and variational method. The article is to be discussed includes that the effect of well width on the ground state energy of the polaron, the influence of Lagrange multiplier u on the vibration frequency, ground state energy and mean number of optical phonon. Numerical calculation showed that the vibration frequency and mean number of optical phonon will increase with Lagrange multiplier u increasing, the ground state energy will decrease with the well width increasing and it decrease with the Lagrange multiplier u increasing.

关 键 词：无限深量子阱 弱耦合极化子 光学声子平均数 

分 类 号：O469[理学—凝聚态物理]