论文标题
Majorana Josephson连接处的量子点介导的奇偶校验翻转
Parity flipping mediated by a quantum dot in Majorana Josephson junctions
论文作者
论文摘要
在当前对拓扑超导体调查的研究中，对Majorana结合状态（MBS）的检测是一个核心问题，拓扑约瑟夫森连接是解决此问题的重要系统。在这项工作中，我们将外部量子点（QD）引入Majorana Josephson连接处（MJJS），并研究了QD与MBS之间的耦合引起的连接的均衡性翻转。当调制QD的能级时，我们证明了对相对的Majorana平等状态之间的Landau-Zener（LZ）过渡。所得的平价翻转过程在整个连接处显示了电压信号。在QD级别的周期性调制的情况下，我们显示了Landau-Zener-Stückelberg（LZS）对平等状态的干扰。我们在不同的驱动频率下展示了独特的干扰模式。这些结果可以用作检测MBS存在的信号。
The detection of the Majorana bound states (MBSs) is a central issue in the current investigation of the topological superconductors, and the topological Josephson junction is an important system for resolving this issue. In this work, we introduce an external quantum dot (QD) to Majorana Josephson junctions (MJJs), and study the parity flipping of the junction induced by the coupling between the QD and the MBSs. We demonstrate Landau-Zener (LZ) transitions between opposite Majorana parity states when the energy level of the QD is modulated. The resulted parity flipping processes exhibit voltage signals across the junction. In the presence of a periodic modulation on the QD level, we show Landau-Zener-Stückelberg (LZS) interference on the parity states. We demonstrate distinctive interference patterns at distinct driving frequencies. These results can be used as signals for detecting the existence of the MBSs.
