arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1907.00532cond-mat.mes-hall
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任意子编织的负过剩散粒噪声

Negative Excess Shot Noise by Anyon Braiding

Byeongmok Lee, Cheolhee Han, H. -S. Sim

摘要:

利用自相关散粒噪声在两个分数量子霍尔边之间的量子点接触处检测到任意分数电荷$e^*$。我们发现,自相关噪声也可以显示指纹的阿贝尔任意分数统计。我们预测的噪声的电隧穿电流$I$在QPC的分数电荷检测设置,当任意子被稀释注入,从一个额外的边缘偏置的电压,在平衡的设置。在大电压下,非平衡噪声比热平衡噪声低{ \it reduced}值$2 e^* I$。该负过量噪声与传统的分数电荷检测的正过量噪声$2e^* I$相反,并且也与电流的通常的正自相关噪声相反。这是阿贝尔分数统计的一个特征,它是由一个在QPC上被热激发的任意子围绕另一个从附加边注入的任意子有效编织而成的。

英文摘要:

Anyonic fractional charges $e^*$ have been detected by autocorrelation shot noise at a quantum point contact (QPC) between two fractional quantum Hall edges. We find that the autocorrelation noise can also show a fingerprint of Abelian anyonic fractional statistics. We predict the noise of electrical tunneling current $I$ at the QPC of the fractional-charge detection setup, when anyons are dilutely injected, from an additional edge biased by a voltage, to the setup in equilibrium. At large voltages, the nonequilibrium noise is {\it reduced} below the thermal equilibrium noise by the value $2 e^* I$. This negative excess noise is opposite to the positive excess noise $2e^* I$ of the conventional fractional-charge detection and also to usual positive autocorrelation noises of electrical currents. This is a signature of the Abelian fractional statistics, resulting from the effective braiding of an anyon thermally excited at the QPC around another anyon injected from the additional edge.

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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