论文标题
分数量子厅效应中的负delta- $ t $噪声
Negative delta-$T$ noise in the Fractional Quantum Hall effect
论文作者
论文摘要
我们研究了经过温度梯度的量子点接触（QPC）的输出处的分数量子大厅边缘的当前相关性。这种不平衡的情况导致了一种被称为delta-$ t $噪声的温度激活的射击噪声形式。我们表明，Laughlin准颗粒的隧道导致了负delta- $ t $噪声，与电子隧道形成鲜明对比。此外，改变QPC的传输或在大厅杆上施加电压偏置可能会翻转这种噪声贡献的迹象，从而产生可以通过实验访问的签名。
We study the current correlations of fractional quantum Hall edges at the output of a quantum point contact (QPC) subjected to a temperature gradient. This out-of-equilibrium situation gives rise to a form of temperature-activated shot noise, dubbed delta-$T$ noise. We show that the tunneling of Laughlin quasiparticles leads to a negative delta-$T$ noise, in stark contrast with electron tunneling. Moreover, varying the transmission of the QPC or applying a voltage bias across the Hall bar may flip the sign of this noise contribution, yielding signatures which can be accessed experimentally.
