嵌有马约拉纳束缚态的T型量子点结构中的电流交叉关联

Current Cross-Correlation in a T-Shaped Quantum-Dot Junction with Majorana Bound States

本文研究了在两个量子点之间嵌入拓扑超导纳米线的T型结构中,由马约拉纳束缚态所引起的电子输运特性,通过考虑对称和反对称两种偏压施加方式,发现量子点之间的超导对势对马约拉纳束缚态的非局域性有重要的影响.主要表现为,相比于电导发生的微弱变化,电流交叉关联的强度明显依赖于偏压施加方式和量子点间的超导对势.这表明电流交叉关联是描述马约拉纳束缚态性质的重要内容.该工作有助于深入理解马约拉纳束缚态的物理特性.

We investigate the electronic transport characteristics caused by the Majorana bound state,in the T-shaped structure with one topological superconducting nanowire embedded between two quantum dots.By considering both symmetric and asymmetric bias modes,it is found that the superconducting pairing term between the quantum dots has a significant impact on the non-locality of the Majorana bound state.The main manifestation is that,compared to the slight change in conductance,the strength of current cross-correlation is significantly dependent on the bias application manner and the superconducting pairing term between the quantum dots.This indicates that current cross-correlation is an effective way to describe the properties of Majorana bound states.This work contributes to a deeper understanding of the physical properties of Majorana bound states.