| 自洽玻恩近似下串联双量子点的量子输运研究 |
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| 引用本文： | 王慧,张鹏,王广新,索丽霞. 自洽玻恩近似下串联双量子点的量子输运研究[J]. 内蒙古师范大学学报(自然科学版), 2009, 38(3) |
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| 作者姓名： | 王慧 张鹏 王广新 索丽霞 |
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| 作者单位： | 中国石油大学(北京)数理系,北京,102249;华北煤炭医学院,基础医学部,河北,唐山,063000;呼和浩特职业学院,教务处,内蒙古,呼和浩特,010051 |
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| 基金项目： | 教育部科学技术研究重点项目 |
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| 摘 要： | 结合自洽玻恩近似,用量子输运主方程理论研究了串联双量子点在任意电压下的输运问题.结果表明,对于无多体相互作用情况,用修正后的主方程理论计算得到的稳态电流-电压特性关系,与用波函数方法获得的结果符合得很好,但单粒子波函数方法不便描述有多体相互作用的量子输运问题,说明自洽玻恩近似下的主方程理论是一个有效的理论方法.给出有库仑阻塞情况下的电流电压关系,得到通常情况下量子主方程不能得到的库仑台阶的量子展宽效应.
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| 关 键 词： | 串联双量子点 量子输运 自洽玻恩近似 输运电流 |
Research on the Quantum Transport of Coupled Double Dots in Mesoscopic Systems at the Level of Self-consistent Born Approximation |
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| WANG Hui,ZHANG Peng,WANG Guang-xin,SUO Li-xia. Research on the Quantum Transport of Coupled Double Dots in Mesoscopic Systems at the Level of Self-consistent Born Approximation[J]. Journal of Inner Mongolia Normal University(Natural Science Edition), 2009, 38(3) |
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| Authors: | WANG Hui ZHANG Peng WANG Guang-xin SUO Li-xia |
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| Abstract: | At the level of self-consistent Born approximation,the quantum transport of coupled dots under random voltages is studied by the quantum transport master equation.The numerical results show that,the method of the corrected quantum master equation accords well with the single wave function method for the condition without many-body interaction.The method of the single wave function is obtained by the Schrodinger equation,so it is very strict.But the wave function method applies in narrow range because it can... |
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| Keywords: | coupled double dots quantum transport self-consistent Born approximation transport current |
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