Non-invasive detection of the Majorana bound state (MBSs), a kind of quasiparticle without charge and mass, is one of the core issues in current condensed matter physics. Here we study in theory the quantum interference effect in parallel-coupled double quantum dots which are connected either by Majorana bound states (MBSs) or regular fermions. We find that the zero-energy conductance develops a sharp peak when the dots are connected by the MBSs, whereas that in the case of the dots are coupled via regular fermions shows a valley. By varying the coupling strength between the dots and the electron reservoirs, the conductance in the two structures changes in different ways. By comparing the properties of the linear conductance in the two systems, the information of the MBSs formed at the two ends of a topological superconductor nanowire then can be inferred. We also find that the MBSs in the present structure also induces the Fano effect, and is favorable in quantum information processing.

一种无电荷且无质量的准粒子，马约拉那结合态（MBSs）的无创检测是当前凝聚态物理的核心问题之一。在这里，我们从理论上研究通过马约拉纳束缚态（MBS）或规则费米子连接的平行耦合双量子点中的量子干涉效应。我们发现，当通过MBS连接点时，零能电导产生一个尖峰，而通过常规费米子连接点的情况下，零能电导显示出一个谷。通过改变点和电子存储器之间的耦合强度，两种结构中的电导以不同的方式改变。通过比较两个系统中线性电导的特性，然后，可以推断出在拓扑超导体纳米线的两端形成的MBS的信息。我们还发现，本结构中的MBS也诱导了Fano效应，并且在量子信息处理中是有利的。