论文标题
相互作用引起的耦合量子点混合纳米线系统中majora零模型的杂交
Interaction induced hybridization of Majorana zero-modes in a coupled quantum-dot hybrid-nanowire system
论文作者
论文摘要
我们研究了由天然量子点组成的混合装置的低能运输特性，该杂种量耦合到托管MajoraNA零模型的拓扑超导纳米线部分的两端。 DOT与最远的MajoraNa零模式之间的耦合的说明允许引入拓扑质量因子，以表征系统中拓扑保护的水平。我们证明，点与拓扑超导部分之间的库仑相互作用会导致描述Majorana零模型的波形的附加重叠的开始，从而导致琐碎的Andreev结合状态，即使是在空间分离良好的Majoaranas中也是如此。这导致了质量因子的破坏，并引入了执行拓扑量子计算操作所需的编织过程的限制。
We study the low-energy transport properties of a hybrid device composed by a native quantum dot coupled to both ends of a topological superconducting nanowire section hosting Majorana zero-modes. The account of the coupling between the dot and the farthest Majorana zero-mode allows to introduce the topological quality factor, characterizing the level of topological protection in the system. We demonstrate that Coulomb interaction between the dot and the topological superconducting section leads to the onset of the additional overlap of the wavefunctions describing the Majorana zero-modes, leading to the formation of trivial Andreev bound states even for spatially well-separated Majoranas. This leads to the spoiling of the quality factor and introduces a constraint for the braiding process required to perform topological quantum computing operations.
