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摘要翻译：
我们研究了一个开放量子点通过量子点接触连接到四个库的非局域电阻中的量子涨落。在这种四端量子点中，电压路径可以从电流路径中分离出来。我们测量了几百欧姆的非局域电阻涨落，它被表征为偏置电压、栅极电压和垂直磁场的函数。当电压探针与点之间的耦合增强时，电阻波动的幅度大大减小。结合实验结果，我们给出了基于Landauer-B\“{u}ttiker形式的理论分析，虽然理论预测的非局域电阻涨落比已观察到的幅度大得多，但如果假设有额外的退相机制，则与理论非常吻合。
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英文标题：
《Non-local detection of resistance fluctuations of an open quantum dot》
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作者：
A.I. Lerescu, E.J. Koop, C.H. van der Wal, B.J. van Wees, J.H.
Bardarson
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Mesoscale and Nanoscale Physics 介观和纳米物理
分类描述：Semiconducting nanostructures: quantum dots, wires, and wells. Single electronics, spintronics, 2d electron gases, quantum Hall effect, nanotubes, graphene, plasmonic nanostructures
半导体纳米结构：量子点、线和阱。单电子学，自旋电子学，二维电子气，量子霍尔效应，纳米管，石墨烯，等离子纳米结构
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
We investigate quantum fluctuations in the non-local resistance of an open quantum dot which is connected to four reservoirs via quantum point contacts. In this four-terminal quantum dot the voltage path can be separated from the current path. We measured non-local resistance fluctuations of several hundreds of Ohms, which have been characterized as a function of bias voltage, gate voltage and perpendicular magnetic field. The amplitude of the resistance fluctuations is strongly reduced when the coupling between the voltage probes and the dot is enhanced. Along with experimental results, we present a theoretical analysis based on the Landauer-B\"{u}ttiker formalism. While the theory predicts non-local resistance fluctuations of considerably larger amplitude than what has been observed, agreement with theory is very good if an additional dephasing mechanism is assumed.
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PDF链接：
https://arxiv.org/pdf/705.3179
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