Fano resonance is believed to arise when a direct path interferes with a resonant path. We demonstrate that this is not true for chiral electronic transmission without additional direct paths. To address the Fano effect in chiral electronic transport, we suggest an electronic Mach-Zehnder-Fano interferometer, which integrates a quantum dot into an electronic Mach-Zehnder interferometer. Due to the absence of backscattering in chiral electronic transport, Fano resonances can be fully adjusted by an external magnetic flux in the transmission, linear conductance, differential conductance, and differential shot noise of chiral electrons. Even the current and shot noise for a symmetric interferometer with two arms of the same length exhibit fully controllable resonances and distinct Fano characteristics. In particular, all the profiles in the various transport spectra follow the same evolution pattern in an evolution cycle that is resistant to changes in the device's defining parameters.

中文翻译：

---

手性电子传输中的完全可调 Fano 共振


当直接路径干扰谐振路径时，人们认为会出现 Fano 共振。我们证明，对于没有额外直接路径的手性电子传输，情况并非如此。为了解决手性电子传输中的 Fano 效应，我们建议使用电子马赫-曾德尔-法诺干涉仪，它将量子点集成到电子马赫-曾德尔干涉仪中。由于手性电子传输中没有反向散射，Fano 谐振可以通过传输中的外部磁通量、线性电导、差分电导和手性电子的差分散粒噪声来完全调节。即使是具有两个相同长度的臂的对称干涉仪的电流和散粒噪声也表现出完全可控的谐振和独特的 Fano 特性。特别是，各种传输光谱中的所有剖面在演化周期中都遵循相同的演化模式，该演化周期不受器件定义参数变化的影响。