The chiral edge modes of a topological superconductor support two types of excitations: fermionic quasiparticles known as Majorana fermions and $\pi$-phase domain walls known as edge vortices. Edge vortices are injected pairwise into counter-propagating edge modes by a flux bias or voltage bias applied to a Josephson junction. An unpaired edge mode carries zero electrical current on average, but there are time-dependent current fluctuations. We calculate the shot noise power produced by a sequence of edge vortices and find that it increases logarithmically with their spacing - even if the spacing is much larger than the core size so the vortices do not overlap. This nonlocality produces an anomalous V log V increase of the shot noise in a voltage-biased geometry, which serves as a distinguishing feature in comparison with the linear-in-V Majorana fermion shot noise.

中文翻译：

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散粒噪声将马约拉那费米子与以手性p波超导体的边缘模式注入的涡旋区分开来

拓扑超导体的手征性边缘模式支持两种类型的激发：称为马约拉纳费米子的费米离子准粒子和称为边缘涡旋的π相相位畴壁。通过施加到约瑟夫森结的通量偏置或电压偏置将边缘涡流成对注入到反向传播的边缘模式中。未配对的边沿模式平均承载零电流，但是存在随时间变化的电流波动。我们计算了一系列边缘涡流产生的散粒噪声功率，发现它随其间距成对数增加-即使间距远大于铁心尺寸，因此涡流也不会重叠。在电压偏置的几何形状中，这种非局部性会导致散粒噪声的V log V异常增加，