Detection of a Majorana-fermion zero mode by a T-shaped quantum-dot structure

Abstract

Electron transport through the T-shaped quantum-dot (QD) structure is theoretically investigated, by considering a Majorana zero mode coupled to the terminal QD. It is found that in the double-QD case, the presence of the Majorana zero mode can efficiently dissolve the antiresonance point in the conductance spectrum and induce a conductance peak to appear at the same energy position whose value is equal to $e^2/2h$. This antiresonance-resonance change will be suitable to detect the Majorana bound states. Next in the multi-QD case, we observe that in the zero-bias limit, the conductances are always the same as the double-QD result, independent of the parity of the QD number. We believe that all these results can be helpful for understanding the properties of Majorana bound states.

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• Entangling Spins in Double Quantum Dots and Majorana Bound States
• Transport properties in a Non-Hermitian triple-quantum-dot structure
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• Renormalization of quantum dot $g$-factor in superconducting Rashba nanowires
• Fano-Majorana effect and bound states in the continuum on a crossbar-shaped quantum dot hybrid structure
• Unveiling Majorana Quasiparticles by a Quantum Phase Transition: Proposal of a Current Switch
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• Properties of the Majorana-state tunneling Josephson junction mediated by an interacting quantum dot
• SPT 2-Channel Kondo Model in the Structure of Normal Metal/Quantum Dot/DIII-class Topological Superconductor
• Majorana-Kondo competition in a cross-shaped double quantum dot-topological superconductor system
• Fingerprints of Majorana bound states in quantum-rings
• Fano fingerprints of Majoranas in Kitaev dimers of superconducting adatoms
• Phase transitions in quantum dot-Majorana zero mode coupling systems
• Continuous unitary transformation approach to the Kondo-Majorana interplay
• Sub-gap Fano resonances in a topological superconducting wire with on-site Coulomb interactions
• Interplay of correlations and Majorana mode from local solution perspective