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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• Robustness of Majorana edge states of short-length Kitaev chains coupled with environment
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• Interplay between Majorana and Shiba states in a minimal Kitaev chain coupled to a superconductor
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• Machine-learned tuning of artificial Kitaev chains from tunneling-spectroscopy measurements
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• Subgap states in semiconductor-superconductor devices for quantum technologies: Andreev qubits and minimal Majorana chains
• Braiding Majoranas in a linear quantum dot-superconductor array: Mitigating the errors from Coulomb repulsion and residual tunneling
• Exploring the energy spectrum of a four-terminal Josephson junction: Towards topological Andreev band structures
• Topological Computation by non-Abelian Braiding in Classical Metamaterials
• Probing Green's Function Zeros by Co-tunneling through Mott Insulators
• Spin-resolved nonlocal transport in proximitized Rashba nanowires
• Nonlocal Josephson diode effect in minimal Kitaev chains
• Shuttling Majorana zero modes in disordered and noisy topological superconductors
• Characterizing local Majorana properties using Andreev states
• The Josephson effect in Fibonacci superconductors
• Properties and prevalence of false poor man's Majoranas in two- and three-site artificial Kitaev chains
• A simple electronic ladder model harboring ${\mathbb{Z}}_4$ parafermions
• Revisiting the Poor Man's Majoranas: The Spin-Exchange Induced Spillover Effect
• Cooper-pair splitters as circuit elements for realizing topological superconductors
• Quantum capacitance and parity switching of a quantum-dot-based Kitaev chain
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• Analytical classification of Majorana zero-mode spatial profiles in extended Kitaev chains: probability maxima can shift inward
• Cavity Control of Topological Qubits: Fusion Rule, Anyon Braiding, and Majorana-Schrödinger Cat States
• Optimal Majoranas in Mesoscopic Kitaev Chains