论文标题
射击噪声将Majorana Fermions与注入手性P-波超导体边缘模式注入的涡流区分开
Shot noise distinguishes Majorana fermions from vortices injected in the edge mode of a chiral p-wave superconductor
论文作者
论文摘要
拓扑超导体的手性边缘模式支持两种类型的激发：费米子准粒子被称为Majorana Fermions和$π$ - 相域壁，称为边缘涡流。边缘涡流通过应用于约瑟夫森交界处的磁通偏置或电压偏置，将边缘涡流置于反向传播的边缘模式中。未配对的边缘模式平均具有零电流，但是存在时间依赖的电流波动。我们计算了由一系列边缘涡流产生的射击噪声功率，发现它与它们的间距相对增加 - 即使间距大得多，因此涡流不会重叠。这种非局部性在电压偏置的几何形状中产生了射击噪声的异常V log V的增加，与线性含量-n-v Majorana fermion shot噪声相比，该噪声是一个显着特征。
The chiral edge modes of a topological superconductor support two types of excitations: fermionic quasiparticles known as Majorana fermions and $π$-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.
