Non-Kondo many-body physics in a Majorana-based Kondo type system

Abstract

We carry out a theoretical analysis of a prototypical Majorana system, which demonstrates the existence of a Majorana-mediated many-body state and an associated intermediate low-energy fixed point. Starting from two Majorana bound states, hosted by a Coulomb-blockaded topological superconductor and each coupled to a separate lead, we derive an effective low-energy Hamiltonian, which displays a Kondo-like character. However, in contrast to the Kondo model which tends to a strong- or weak-coupling limit under renormalization, we show that this effective Hamiltonian scales to an intermediate fixed point, whose existence is contingent upon teleportation via the Majorana modes. We conclude by determining experimental signatures of this fixed point, as well as the exotic many-body state associated with it.

published version

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Cited by in corpus (8)

• Kondo and Majorana signatures near the singlet-doublet quantum phase transition
• Spin-resolved thermal signatures of Majorana-Kondo interplay in double quantum dots
• Topological Majorana Two-Channel Kondo Effect
• Two-Channel Kondo Physics in a Majorana Island Coupled to a Josephson Junction
• Full counting statistics in a Majorana single-charge transistor
• Probing nonlocality of Majorana fermions in Josephson junctions of Kitaev chains connected to normal metal leads
• Non-Equilibrium Charge Dynamics in Majorana-Josephson Devices
• Interplay between pairing and correlations in spin-polarized bound states