论文标题
在长纳米线连接处区分微不足道和拓扑的零能状态
Distinguishing trivial and topological zero energy states in long nanowire junctions
论文作者
论文摘要
非原始超导体中零能状态的出现代表了一个不可避免的问题，它掩盖了零能量的零能量主要结合状态（MBS）的适当识别，并防止它们用作拓扑保护的量子。在这封研究信中，我们研究了长期的超导体非正常 - 抗螺旋体连接处，在正常区域中，较大范围的零范围的零能状态在大量参数上出现了强大的稳定性。我们证明，在拓扑阶段托管MBS的超导体区域长度的变化敏感，但显着，当存在稳健但琐碎的零能状态时，不存在这样的长度依赖性。这种明显不同的响应源于MBS的非本地性质，因此，我们将其作为一个简单的方案，用于区分琐碎和拓扑零能量状态。
The emergence of zero energy states in non-topological superconductors represents an inevitable problem that obscures the proper identification of zero energy Majorana bound states (MBSs) and prevents their use as topologically protected qubits. In this Research Letter we investigate long superconductor-normal-superconductor junctions where trivial zero energy states, robust over a large range of parameters, appear as a result of helicity and confinement in the normal region. We demonstrate that both equilibrium supercurrents and critical currents are sensitive to variations in the length of the superconductor regions in the topological phase hosting MBSs, but, remarkably, no such length dependence exists when robust, but trivial, zero energy states are present. This strikingly different response originates from the non-local nature of the MBSs and we, therefore, propose it as a simple protocol for distinguishing between trivial and topological zero energy states.
