安德列夫反射
马约拉纳
物理
拓扑量子计算机
量子隧道
超导电性
束缚态
电荷(物理)
实现(概率)
量子点
量子力学
凝聚态物理
量子
联轴节(管道)
拓扑(电路)
统计
数学
组合数学
机械工程
工程类
作者
Tom Dvir,Guanzhong Wang,Nick van Loo,Chun-Xiao Liu,Grzegorz P. Mazur,Alberto Bordin,Sebastiaan L. D. ten Haaf,Ji-Yin Wang,David van Driel,Francesco Zatelli,Xiang Li,Filip K. Malinowski,Saša Gazibegović,Ghada Badawy,Erik P. A. M. Bakkers,Michael Wimmer,Leo P. Kouwenhoven
出处
期刊:Nature
[Springer Nature]
日期:2023-02-15
卷期号:614 (7948): 445-450
被引量:104
标识
DOI:10.1038/s41586-022-05585-1
摘要
Majorana bound states constitute one of the simplest examples of emergent non-Abelian excitations in condensed matter physics. A toy model proposed by Kitaev shows that such states can arise at the ends of a spinless $p$-wave superconducting chain. Practical proposals for its realization require coupling neighboring quantum dots in a chain via both electron tunneling and crossed Andreev reflection. While both processes have been observed in semiconducting nanowires and carbon nanotubes, crossed-Andreev interaction was neither easily tunable nor strong enough to induce coherent hybridization of dot states. Here we demonstrate the simultaneous presence of all necessary ingredients for an artificial Kitaev chain: two spin-polarized quantum dots in an InSb nanowire strongly coupled by both elastic co-tunneling and crossed Andreev reflection. We fine-tune this system to a sweet spot where a pair of Poor Man's Majorana states is predicted to appear. At this sweet spot, the transport characteristics satisfy the theoretical predictions for such a system, including pairwise correlation, zero charge and stability against local perturbations. While the simple system presented here can be scaled to simulate a full Kitaev chain with an emergent topological order, it can also be used imminently to explore relevant physics related to non-Abelian anyons.
科研通智能强力驱动
Strongly Powered by AbleSci AI