发表机构
Konkuk University; Karlstad University（建国大学; 卡尔斯特德大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出一个通用框架，用于解析复杂分数量子霍尔边缘的散粒噪声，通过组合自相关与互相关抑制加热影响，从而准确提取隧穿准粒子电荷。
AI 中文摘要
利用量子点接触的散粒噪声测量为探测Laughlin分数量子霍尔（FQH）态中的准粒子电荷提供了直接手段。然而，对于多通道边缘，这种测量的解释变得更加微妙，因为点接触隧穿噪声与模式间平衡和加热产生的噪声共存。我们开发了一个包含这两种贡献的通用框架，并将其应用于典型的ν=2/3分数量子霍尔边缘。我们推导了四端量子点接触几何结构中漏极自相关和互相关的表达式，并表明平衡诱导的加热对自相关和互相关的影响方式与内在分配噪声在参数上不同。这一区别使我们能够提出两种相关性的特定组合，该组合能强烈抑制加热贡献并完全恢复隧穿准粒子电荷。因此，我们的结果为解释复杂分数量子霍尔边缘中的散粒噪声测量提供了一个系统框架，并可进一步扩展到更一般的反向传播边缘结构。
英文摘要
Shot-noise measurements with a quantum point contact provide a direct probe of the quasiparticle charge in Laughlin fractional quantum Hall (FQH) states. However, the interpretation of such measurements becomes more subtle for multichannel edges, where the point-contact tunneling noise coexists with noise generated by intermode equilibration and heating. We develop a general framework that incorporates both these contributions and apply it to the paradigmatic $ν=2/3$ FQH edge. We derive expressions for the drain auto- and cross-correlations in a four-terminal QPC geometry and show that equilibration-induced heating affects the auto- and cross-correlations in parametrically different way than the intrinsic partition noise. This distinction permits us to propose a specific combination of the two correlations which strongly suppresses the heating contribution and fully recovers the tunneling quasiparticle charge. Our results thereby provide a systematic framework for interpreting shot-noise measurements in complex FQH edges and can be further extended to more general counterpropagating edge structures.
Comments15 pages, 5 figures
