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

页码：203 / 210

页数：8

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