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arXiv 0912.4868cond-mat.mes-hallcond-mat.quant-gas
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通过量子散粒噪声测量确定分数电荷

Fractional Charge Determination via Quantum Shot Noise Measurements

Moty Heiblum

摘要:

在量子化磁场和分数量子霍尔效应机制下,二维电子气中的电荷激发沿着样品的边缘以一维带状流动。这些激发(准粒子)可以是独立的或凝聚成相互作用的手性Luttinger液体。增加一个后向散射势,它将一个向前传播的准粒子反射到一个向后传播的准粒子上,将准粒子流分割并诱导出量子散粒噪声。噪声与准粒子电荷成正比,并可能受到它们之间相互作用的影响。确定的电荷对温度的依赖性,激发能,和分区将描述几个分数状态,揭示在某些情况下的普遍行为。

英文摘要:

Charge excitations in a two dimensional electron gas, under a quantizing magnetic field and in the fractional quantum Hall effect regime, flow in one dimensional-like strips along the edges of the sample. These excitations (quasiparticles) may be independent or condense into an interacting chiral Luttinger liquid. Adding a backscattering potential, which reflects a forward propagating quasiparticle to a backward propagating one, partitions the stream of quasiparticles and induces quantum shot noise. The noise is proportional to quasiparticles charge and may be affected by their mutual interactions. The dependence of the determined charge on the temperature, excitation energy, and partitioning will be describes for a few fractional states, revealing in some cases a universal behavior.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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