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arXiv 1104.4072cond-mat.mes-hall
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量子霍尔边缘上的电荷分形

Charge Fractionalization on Quantum Hall Edges

Mats Horsdal, Marianne Rypestøl, Hans Hansson, Jon Magne Leinaas

摘要:

我们讨论的传播和局部电荷的边缘上的可变宽度的量子霍尔酒吧,其中边缘之间的相互作用引起的Luttinger液体行为与一个非平凡的相互作用参数g的分数。我们特别关注的初始电荷脉冲分离成一个明确定义的前电荷和一个更广泛的尾巴。前脉冲描述了一个带有非整数电荷的电子,该电荷是电子电荷的\sqrt{g}倍。我们将讨论如何存在的这种分数电荷,在原则上,可以通过测量的电子隧穿到系统中所产生的电流中的噪声来检测。通过对霍尔棒的简化模型进行数值模拟,说明了结果。

英文摘要:

We discuss the propagation and fractionalization of localized charges on the edges of quantum Hall bars of variable widths, where interactions between the edges give rise to Luttinger liquid behavior with a non-trivial interaction parameter g. We focus in particular on the separation of an initial charge pulse into a sharply defined front charge and a broader tail. The front pulse describes an adiabatically dressed electron which carries a non-integer charge, which is \sqrt{g} times the electron charge. We discuss how the presence of this fractional charge can, in principle, be detected through measurements of the noise in the current created by tunneling of electrons into the system. The results are illustrated by numerical simulations of a simplified model of the Hall bar.

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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