2023/06/13 by Alberto Bordin, Xiang Li, Bordin, Alberto +17 · 12 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Topological Materials and Phenomena #Physics of Superconductivity and Magnetism
paper · pdf · doi:10.48550/arxiv.2306.07696
The formation of a topological superconducting phase in a quantum-dot-based Kitaev chain requires nearest neighbor crossed Andreev reflection and elastic co-tunneling. Here we report on a hybrid InSb nanowire in a three-site Kitaev chain geometry - the smallest system with well-defined bulk and edge - where two superconductor-semiconductor hybrids separate three quantum dots. We demonstrate pairwise crossed Andreev reflection and elastic co-tunneling between both pairs of neighboring dots and show sequential tunneling processes involving all three quantum dots. These results are the next step towards the realization of topological superconductivity in long Kitaev chain devices with many coupled quantum dots.