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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1506.07553cond-mat.str-elcond-mat.mes-hall
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用散粒噪声测量Luttinger液体参数

Measuring the Luttinger liquid parameter with shot noise

J. K. Kühne, I. V. Protopopov, Y. Oreg, A. D. Mirlin

摘要:

我们探讨了低频噪声的相互作用的电子在一维结构(量子线或相互作用耦合的边缘状态)与反向传播模式,假设在每个方向上的一个单一的通道。该系统被驱动的量子点接触(QPC)与施加的电压,这引起了一个双步骤的能量分布的入射电子在设备的一侧的平衡。第二个QPC用于探索出射电子的统计。我们表明,在这样的设置中的低频噪声的测量允许一个提取的Luttinger液体常数$K$,这是一个相互作用的1D系统的关键参数。我们评估了零频率噪声对$K$和两个QPC的参数(振幅和电压)的依赖性。

英文摘要:

We explore the low-frequency noise of interacting electrons in a one-dimensional structure (quantum wire or interaction-coupled edge states) with counterpropagating modes, assuming a single channel in each direction. The system is driven out of equilibrium by a quantum point contact (QPC) with an applied voltage, which induces a double-step energy distribution of incoming electrons on one side of the device. A second QPC serves to explore the statistics of outgoing electrons. We show that measurement of a low-frequency noise in such a setup allows one to extract the Luttinger liquid constant $K$ which is the key parameter characterizing an interacting 1D system. We evaluate the dependence of the zero-frequency noise on $K$ and on parameters of both QPCs (transparencies and voltages).

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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