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Strongly enhanced shot noise in chains of quantum dots

机译:量子点链中的散粒噪声大大增强

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The authors study charge transport through a chain of quantum dots. The dots are fully coherent among each other and weakly coupled to metallic electrodes. If the Coulomb interaction dominates over the interdot hopping the authors find strongly enhanced shot noise at biases above the sequential tunneling threshold, with an enhancement which can easily reach a factor of ~100. This strong enhancement may allow direct experimental detection of shot noise, e.g., in a chain of quantum dots formed in semiconductor heterostructures. The current is not enhanced in the region of enhanced noise, thus rendering the shot noise super-Poissonian.
机译:作者研究了通过量子点链的电荷传输。点彼此之间完全连贯,并且弱耦合到金属电极。如果库仑相互作用在点间跳变中占主导地位,则作者会发现,在高于连续隧穿阈值的偏差处,散粒噪声得到了大大增强,增强效果很容易达到约100倍。这种强的增强可以允许例如在半导体异质结构中形成的量子点链中的散粒噪声的直接实验检测。在增强噪声的区域中电流没有增强,因此散粒噪声成为超泊松噪声。

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