Characterizing local Majorana properties using Andreev states
M. Alvarado, A. Levy Yeyati, Ramón Aguado, R. Seoane Souto
DOI 10.1103/1jqt-3ht5 · Physical Review B
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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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