Dephasing rate in an InAs/GaAs single-electron quantum dot qubit

成果类型：

期刊论文

作者：

Pan, LX;Li, SS*;Liu, JL;Niu, ZC;Feng, SL;...

通讯作者：

Li, SS

作者机构：

[Li, SS] Chinese Acad Sci, Inst Semicond, Natl Lab Superlattices & Microstruct, Beijing 100083, Peoples R China.

Yiyang Teachers Coll, Dept Phys, Yiyang 413049, Peoples R China.

通讯机构：

[Li, SS] C

Chinese Acad Sci, Inst Semicond, Natl Lab Superlattices & Microstruct, Beijing 100083, Peoples R China.

语种：

英文

关键词：

quantum dot;quantum computing;decoherence

期刊：

SCIENCE IN CHINA SERIES A-MATHEMATICS

ISSN：

1006-9283

年：

2002

卷：

45

期：

5

页码：

666-670

DOI：

10.3969/j.issn.1674-7283.2002.05.015

基金类别：

This work was supported by the National Natural Science Foundation of China （ Grant Nos. 19974043 & 60025410）.；

机构署名：

本校为其他机构

院系归属：

信息与电子工程学院

摘要：

We have obtained the parameter-phase diagram, which unambiguously defines the parameter region for the use of InAs/GaAs quantum dot as two-level quantum system in quantum computation in the framework of the effective-mass envelope function theory. Moreover, static electric field is found to efficiently prolong decoherence time. As a result, decoherence time may reach the order of magnitude of milli-seconds as external static electric field goes beyond 20 kV/cm if only vacuum fluctuation is taken as the main source for decoherence. Our calculated results are u...

摘要(中文)：

We have obtained the parameter-phase diagram, which unambiguously defines the parameter region for the use of InAs/GaAs quantum dot as two-level quantum system in quantum computation in the framework of the effective-mass envelope function theory. Moreover, static electric field is found to efficiently prolong decoherence time. As a result, decoherence time may reach the order of magnitude of milli-seconds as external static electric field goes beyond 20 kV/cm if only vacuum fluctuation is taken as the main source for decoherence. Our calculated results are useful...

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