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arXiv · 2507.20591

Characterizing local Majorana properties using Andreev states

Miguel Alvarado·Alfredo Levy Yetati·Ramón Aguado·Rubén Seoane Souto
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Abstract

We propose using Andreev bound states (ABS) as spectroscopic probes to characterize Majorana zero modes (MZMs) in quantum-dot based minimal Kitaev chains. Specifically, we show that tunneling conductance measurements with a superconducting probe hosting an ABS reveal four subgap peaks whose voltage positions and relative heights enable extraction of the MZM energy splitting and Bogoliubov-de Gennes coherence factors. This provides direct access to zero-splitting regimes and to the local Majorana polarization - a measure of the Majorana character. The method is compatible with existing experimental architectures and remains robust in extended chains.

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Miguel Alvarado, Alfredo Levy Yetati, Ramón Aguado, Rubén Seoane Souto. 2025-07-28. Characterizing local Majorana properties using Andreev states. https://doi.org/10.1103/1jqt-3ht5

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