Crossed Andreev reflection and elastic co-tunneling in a three-site Kitaev chain nanowire device

Abstract

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.

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Cited by in corpus (37)

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• Robustness of Majorana edge states of short-length Kitaev chains coupled with environment
• Fate of poor man's Majoranas in the long Kitaev chain limit
• Entanglement measures of Majorana bound states
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• Interplay between Majorana and Shiba states in a minimal Kitaev chain coupled to a superconductor
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• Non-Hermitian minimal Kitaev chains
• Machine-learned tuning of artificial Kitaev chains from tunneling-spectroscopy measurements
• Extended Hubbard model describing small multi-dot arrays in bilayer graphene
• Supercurrent through an Andreev trimer
• Scaling up a sign-ordered Kitaev chain without magnetic flux control
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• Topological Computation by non-Abelian Braiding in Classical Metamaterials
• Probing Green's Function Zeros by Co-tunneling through Mott Insulators
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• The Josephson effect in Fibonacci superconductors
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• Cooper-pair splitters as circuit elements for realizing topological superconductors
• Quantum capacitance and parity switching of a quantum-dot-based Kitaev chain
• Entanglement dynamics in minimal Kitaev chains
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• Optimal Majoranas in Mesoscopic Kitaev Chains