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Bidirectional single-electron counting and the fluctuation theorem

机译:双向单电子计数和涨落定理

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摘要

We investigate the direction-resolved full counting statistics of single-electron tunneling through a double quantum-dot system and compare with predictions of the fluctuation theorem (FT) for Markovian stochastic processes. Experimental data obtained for GaAs/GaAlAs heterostructures appear to violate the FT. After analyzing various potential sources for the discrepancy we conclude that the nonequilibrium shot noise of the quantum point contact electrometer, which is used to study the transport, induces strong dot-level fluctuations which significantly influence the tunneling statistics. Taking these modifications into account we find consistency with the FT.
机译:我们研究通过双量子点系统的单电子隧穿的方向解析全计数统计,并与马尔可夫随机过程的波动定理(FT)的预测进行比较。从GaAs / GaAlAs异质结构获得的实验数据似乎违反了FT。在分析了各种可能的差异来源之后,我们得出结论,用于研究传输的量子点接触静电计的非平衡散粒噪声会引起强烈的点级波动,从而极大地影响隧穿统计。考虑到这些修改,我们发现与《金融时报》保持一致。

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  • 来源
    《Physical review》 |2010年第12期|p.125331.1-125331.5|共5页
  • 作者单位

    Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan;

    rnInstitut fuer Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany;

    rnInstitut fuer Theoretische Festkoerperphysik and DFG Center for Functional Nanostructures (CFN), Universitaet Karlsruhe, 76128 Karlsruhe, Germany;

    rnGraduate School of Science, University of Tokyo, Tokyo 113-0033, Japan;

    rnNTT Basic Research Laboratories, NTT Corporation, Morinosato-Wakamiya, Atsugi 243-0198, Japan Research Center for Low Temperature Physics, Tokyo Institute of Technology, Ookayama, Meguro, Tokyo 152-8551, Japan;

    rnInstitut fuer Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany Institut fuer Theoretische Festkoerperphysik and DFG Center for Functional Nanostructures (CFN), Universitaet Karlsruhe, 76128 Karlsruhe, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    coulomb blockade; single-electron tunneling; noise processes and phenomena; nonequilibrium and irreversible thermodynamics;

    机译:库仑封锁;单电子隧穿噪声过程和现象;非平衡和不可逆的热力学;

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