Majorana mode leaking into a spin-charge entangled double quantum dot

Abstract

The signatures of Majorana zero-energy mode leaking into a spin-charge entangled double quantum dot are investigated theoretically in the strong electron correlation regime. The considered setup consists of two capacitively coupled quantum dots attached to external contacts and side-attached to topological superconducting wire hosting Majorana quasiparticles. We show that the presence of Majorana mode gives rise to unique features in the local density of states in the $SU(4)$ Kondo regime. Moreover, it greatly modifies the gate voltage dependence of the linear conductance, leading to fractional values of the conductance. We also analyze the effect of a finite length of topological wire and demonstrate that non-zero overlap of Majorana modes at the ends of the wire is revealed in local extrema present in the local density of states of the dot coupled directly to the wire. The calculations are performed with the aid of the numerical renormalization group method.

12 pages, 10 figures

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Cited by in corpus (4)

• Effect of induced transition on the quantum entanglement and coherence in two-coupled double quantum dots system
• Majorana-Kondo competition in a cross-shaped double quantum dot-topological superconductor system
• Phonon-Assisted Tunneling through Quantum Dot Systems Connected to Majorana Bound States
• Transient effects in quantum dots contacted via topological superconductor