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arXiv 0712.0879cond-mat.mes-hall
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量子霍尔系统中的准粒子传输

Quasi-particle propagation in quantum Hall systems

Diptiman Sen, Michael Stone, Smitha Vishveshwara

摘要:

我们研究了在量子霍尔系统的物理环境中服从分数统计的粒子的传播的各种几何方面。我们在最低朗道能级中找到了两粒子核的离散零点集;这些是由两粒子阿哈罗诺夫-博姆效应和与分数统计相关的交换相结合产生的。内核还显示短距离排除统计,例如,在幂律行为中作为粒子的初始和最终位置的函数。我们采用单粒子核计算杂质介导的隧道振幅之间的不同边缘的有限大小的量子霍尔系统,并发现它们消失的杂质散射势的某些强度和位置。我们表明,即使在没有散射,不同的边缘之间的关联函数表现出不寻常的功能,一个足够窄的霍尔酒吧。

英文摘要:

We study various geometrical aspects of the propagation of particles obeying fractional statistics in the physical setting of the quantum Hall system. We find a discrete set of zeros for the two-particle kernel in the lowest Landau level; these arise from a combination of a two-particle Aharonov-Bohm effect and the exchange phase related to fractional statistics. The kernel also shows short distance exclusion statistics, for instance, in a power law behavior as a function of initial and final positions of the particles. We employ the one-particle kernel to compute impurity-mediated tunneling amplitudes between different edges of a finite-sized quantum Hall system and and find that they vanishes for certain strengths and locations of the impurity scattering potentials. We show that even in the absence of scattering, the correlation functions between different edges exhibits unusual features for a narrow enough 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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