论文标题
部分可观测时空混沌系统的无模型预测
Majorana-like Coulomb spectroscopy in the absence of zero bias peaks
论文作者
论文摘要
混合半导体 - 驱动器设备可以通过Majorana零模式（MZM）实现拓扑量子计算具有巨大的希望。但是，基于隧道或库仑封锁（CB）光谱的多次索赔仍然存在争议。在这里，我们设计了一种实验协议，该协议允许通过可调连接到正常导线来调整其充电能，可以在同一混合岛上执行两种类型的测量。 This method reduces ambiguities of Majorana detections by checking the consistency between CB spectroscopy and zero bias peaks (ZBPs) in non-blockaded transport.Specifically, we observe junction-dependent, even-odd modulated, single-electron CB peaks in InAs/Al hybrid nanowires (NWs) without concomitant low-bias peaks in tunneling spectroscopy.我们以低能量，纵向限制的岛屿状态而不是重叠的主要模式来对实验观察进行理论解释。我们的结果突出了同一设备上合并测量对于识别拓扑MZM的重要性。
Hybrid semiconductor-superconductor devices hold great promise for realizing topological quantum computing with Majorana zero modes (MZMs). However, multiple claims of Majorana detection, based on either tunneling or Coulomb blockade (CB) spectroscopy, remain disputed. Here we devise an experimental protocol that allows to perform both types of measurements on the same hybrid island by adjusting its charging energy via tunable junctions to the normal leads. This method reduces ambiguities of Majorana detections by checking the consistency between CB spectroscopy and zero bias peaks (ZBPs) in non-blockaded transport.Specifically, we observe junction-dependent, even-odd modulated, single-electron CB peaks in InAs/Al hybrid nanowires (NWs) without concomitant low-bias peaks in tunneling spectroscopy. We provide a theoretical interpretation of the experimental observations in terms of low-energy, longitudinally-confined island states rather than overlapping Majorana modes. Our results highlight the importance of combined measurements on the same device for the identification of topological MZMs.
