OPTICAL PHONON EFFECT IN AN ASYMMETRIC QUANTUM DOT QUBIT

被引：30

作者：

Ding, Zhao-Hua ^{[1
]}

Sun, Yong ^{[1
]}

Xiao, Jing-Lin ^{[1
]}

机构：

[1] Inner Mongolia Natl Univ, Coll Phys & Elect Informat, Tongliao 028043, Peoples R China

来源：

INTERNATIONAL JOURNAL OF QUANTUM INFORMATION | 2012年 / 10卷 / 07期

基金：

美国国家科学基金会;

关键词：

Asymmetric quantum dot; qubit; probability density; oscillation period;

D O I：

10.1142/S0219749912500773

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

We investigate the eigenenergies and the eigenfunctions of the ground and the first excited states of an electron, which is strongly coupled to LO-phonon in an asymmetric quantum dot (QD) by using variational method of Pekar type. The present system may be used as a two-level qubit. When the electron is in the superposition state of the ground and the first excited states, the probability density of the electron oscillates in the QD with a certain period. It is found that the oscillation period is an increasing function of the transverse and the longitudinal effective confinement lengths of the QD, whereas it is a decreasing one of the electron-phonon coupling strength.

引用

页数：9

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