Leakage of Majorana mode into correlated quantum dot nearby its singlet-doublet crossover

Abstract

We study quasiparticle spectrum of the correlated quantum dot deposited on superconducting substrate which is side-coupled to the Rashba nanochain, hosting Majorana end modes. Ground state of an isolated quantum dot proximitized to superconducting reservoirs is represented either by the singly occupied site or BCS-type superposition of the empty and doubly occupied configurations. Quantum phase transition between these distinct ground states is spectroscopically manifested by the in-gap Andreev states which cross each other at the Fermi level. This qualitatively affects leakage of the Majorana mode from the side-attached nanowire. We inspect the spin-selective relationship between the trivial Andreev states and the leaking Majorana mode, considering (i) perfectly polarized case, when tunneling of one spin component is completely prohibited, and (ii) another one when both spins are hybridized with the nanowire but with different couplings.

arXiv comment7 pages, 5 figures

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Cited by in corpus (9)

• Generalized atomic limit of a double quantum dot coupled to superconducting leads
• Majorana mode leaking into a spin-charge entangled double quantum dot
• Topological isoconductance signatures in Majorana nanowires
• Dynamical leakage of Majorana mode into side-attached quantum dot
• Anomalous Fano Resonance in Double Quantum Dot System Coupled to Superconductor
• Transient effects in quantum dots contacted via topological superconductor
• Nonlocal correlations transmitted between quantum dots via short topological superconductor
• Nonlocal signatures of hybridization between quantum dot and Andreev bound states
• Interplay of correlations and Majorana mode from local solution perspective