论文标题
通过Landau-Zener Transition读取Majorana Bound Younat
Readout of Majorana bound states via Landau-Zener transition
论文作者
论文摘要
读取Maporana绑定状态（MBSS）对于验证其非亚洲特性并实现拓扑量子计算至关重要。在这里，我们构建了一个协议，以测量一个耦合到双量子点（DQD）的主要岛上两个MBS的均衡。通过Landau-Zener过渡，将奇偶校验信息映射到DQD的电荷状态。所需的操作是扫除DQD的偏置，然后进行电荷感应。在没有微调的情况下，一次扫描和检测实现了奇偶校验的弱测量。我们发现，一般而言，大约十次运行的顺序将完全将叠加状态投射到奇偶校验中，并且每次运行中的电荷检测都会记录MBSS状态如何逐步崩溃。值得注意的是，该读数协议是非拆卸的，并且强劲到低频电荷波动。
Reading out Majorana bound states (MBSs) is essential both to verify their non-Abelian property and to realize topological quantum computation. Here, we construct a protocol to measure the parity of two MBSs in a Majorana island coupled to double quantum dot (DQD). The parity information is mapped to the charge state of the DQD through Landau-Zener transition. The operation needed is sweeping the bias of the DQD, which is followed by charge sensing. In the case without fine-tuning, a single run of sweep-and-detection implement a weak measurement of the parity. We find that in general a sequence of about ten runs would completely project a superposition state to either parity, and the charge detection in each run records how the state of MBSs collapses step by step. Remarkably, this readout protocol is of non-demolition and robust to low frequency charge fluctuation.
