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arXiv 1402.6488cond-mat.str-elcond-mat.mes-hallcond-mat.quant-gas
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用共振探测器研究多准粒子霍尔谱

Multiple quasiparticle Hall spectroscopy investigated with a resonant detector

D. Ferraro, M. Carrega, A. Braggio, M. Sassetti

摘要:

我们研究有限频率(f.f.)量子霍尔机制中边缘态的噪声特性。我们考虑在弱背散射极限下,量子点接触与共振探测器耦合的测量方案。详细分析了由于谐振检测器的存在而导致的“测量”噪声与对称化f.f.噪音出现了。我们讨论了Laughlin和Jain序列,研究这些层次模型中的隧穿激发。我们认为,测量的噪声可以更好地区分不同的激发在隧道过程中相对于对称的f.f.在实验相关参数范围内的对应物。最后,我们说明了这种措施的灵敏度的检测器温度的影响。

英文摘要:

We investigate the finite frequency (f.f.) noise properties of edge states in the quantum Hall regime. We consider the measurement scheme of a resonant detector coupled to a quantum point contact in the weak-backscattering limit. A detailed analysis of the difference between the "measured" noise, due to the presence of the resonant detector, and the symmetrized f.f. noise is presented. We discuss both the Laughlin and Jain sequences, studying the tunnelling excitations in these hierarchical models. We argue that the measured noise can better distinguish between the different excitations in the tunnelling process with respect to the symmetrized f.f. counterpart in an experimentally relevant range of parameters. Finally, we illustrate the effect of the detector temperature on the sensibility of this measure.

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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