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量子点中极化子的速率对光学声子平均数的影响
张鹏¹,肖景林²
(1.中国石油大学數理系，北京102249;2.内蒙古民族大学物理系，内蒙古通辽028043)

摘要:

研究了量子点中极化子的性质。采用Tokuda改进的线性组合算符法、拉格朗日乘子法和变分法，导出了量子点中极化子的振动频率和声子平均数，讨论了在强弱耦合情况下极化子的速率对光学声子平均数的影响。研究结果表明，光学声子平均数随极化子的速率增加而增大。

关键词: 量子点极化子速率光学声子平均数中图分类号:0 469 文献标识码:A

DOI：

分类号:

基金项目:国家自然科学基金项目(10347004);中国石油大学(北京)校长基金资助项目(2005)

Influence of velocity of polaron in quantum dots on the ' mean number of optical phonons

ZHANG Peng¹,XIAO Jing-lin²

(1. Department of Mathematics and Physics in China University of Petroleum, Beijing 102249，China;2. Department of Physics，Inner Mongolia National University f Tongliao 028043, Neimengu, China)

Abstract:

The properties of polaron in quantum dots were investigated. The vibration frequency and the mean number of phonons of polaron in quantum dots were calculated by using Tokuda's improved linear combination operator and Lagrange multiplier and variational method. Influence of the velocity of the polaron on the mean number of optical phonons were discussed for strong-coupling and weak-coupling. The results show that the mean number of phonons increases with the velocity of the polaron increasing.

Key words: quantum dot velocity of polaron mean number of optical phonons