THE INFLUENCE OF ELECTRIC FIELD ON THE GROUND-STATE LIFETIME OF POLARON IN A PARABOLIC QUANTUM DOT

被引：2
|
作者：
Li, Wei-Ping [1 ]
Yin, Ji-Wen [1 ]
Yu, Yi-Fu [1 ]
Xiao, Jing-Lin [2 ]
机构：
[1] Chifeng Coll, Dept Phys & Elect Informat Engn, Chifeng 024000, Peoples R China
[2] Inner Mongolia Natl Univ, Coll Phys & Elect Informat, Tongliao 028043, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2011年 / 25卷 / 03期
关键词：
Quantum dot; quantum transition; the lifetime of polaron; BOUND POLARON; DYNAMICS; QUBIT;
D O I：
10.1142/S0217984911025596
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The ground-state energy of polaron was obtained with strong electron-LO-phonon coupling by using a variational method of the Pekar type in a parabolic quantum dot (QD). Quantum transition occurs in the quantum system due to the electron-phonon interaction and the influence of temperature. That is the polaron transition from the ground-state to the first-excited state after absorbing a LO-phonon and it causes the changing of the polaron lifetime. Numerical calculations are performed and the results illustrate the relations of the ground-state lifetime of the polaron on the ground-state energy of polaron, the electric field strength, the temperature, the electron-LO-phonon coupling strength and the confinement length of the quantum dot.
引用
收藏
页码：203 / 210
页数：8
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