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首页> 外文会议>International Symposium on Quantum Confinement VI: Nanostructured Materials and Devices, Sep 5-6, 2001, San Francisco, CA >SEMICLASSICAL VERSUS QUANTUM-MECHANICAL SHOT NOISE POWER IN A TWO-DIMENSIONAL ARRAY OF ELASTIC SCATTERERS
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SEMICLASSICAL VERSUS QUANTUM-MECHANICAL SHOT NOISE POWER IN A TWO-DIMENSIONAL ARRAY OF ELASTIC SCATTERERS

机译：二维二维二维散射体中的半经典对量子力学发射功率

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摘要

Using a scattering-matrix formalism, we compute the semiclassical and quantum-mechanical shot noise power in a disordered two-dimensional resistor consisting of a rectangular array of point elastic scatterers. The shot noise power is calculated as a function of sample length. The width of the samples and the Fermi energy are such that the total number of propagating modes (current carrying channels) is kept below 10. We show the importance of including evanescent modes to compute the Fano factor which characterizes the deviation of the quantum-mechanical shot noise power from the full shot noise limit. The Fano factor is typically found to be much larger than the one-third limit predicted for the case of coherent transport through quasi-one-dimensional metallic diffusive resistors.
机译：使用散射矩阵形式主义，我们计算了由点弹性散射体的矩形阵列组成的无序二维电阻器中的半经典和量子力学散粒噪声功率。散粒噪声功率是根据样本长度计算的。样本的宽度和费米能量使得传播模式（载流通道）的总数保持在10以下。我们显示了包括e逝模式以计算表征量子力学偏差的Fano因子的重要性。散粒噪声功率来自全散粒噪声限制。通常发现，Fano因子比通过准一维金属扩散电阻器进行相干传输的情况下预测的极限值大三分之一。

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