Probing Majorana Physics in Quantum Dot Shot Noise Experiments

Abstract

We consider a quantum dot coupled to a topological superconductor and two normal leads and study transport properties of the system. Using Keldysh path-integral approach, we study current fluctuations (shot noise) within the low-energy effective theory. We argue that the combination of the tunneling conductance and the shot noise through a quantum dot allows one to distinguish between the topological (Majorana) and non-topological (e.g., Kondo) origin of the zero-bias conduction peak. Specifically, we show that, while the tunneling conductance might exhibit zero-bias anomaly due to Majorana or Kondo physics, the shot noise is qualitatively different in the presence of Majorana zero modes.

14 pages, 10 figures, with appendix, references updated

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Cited by in corpus (7)

• Interaction effects on a Majorana zero mode leaking into a quantum dot
• Spin-resolved interference due to Majorana state on interface between normal and superconducting leads
• Majorana finite frequency nonequilibrium quantum noise
• Andreev and Majorana bound states in single and double quantum dot structures
• Multiple Andreev reflections in s-wave superconductor-quantum dot- topological superconductor tunnel junctions and Majorana bound states
• Gapless odd-frequency superconductivity induced by the Sachdev-Ye-Kitaev model
• Majorana transport in superconducting nanowire with Rashba and Dresselhaus spin-orbit couplings