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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• Current Correlations in a Majorana Beam Splitter
• Majorana-Kondo interplay in T-shaped double quantum dots
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• Majorana entropy revival via tunneling phases
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• Majorana mode leaking into a spin-charge entangled double quantum dot
• Majorana bound states in a superconducting Rashba nanowire in the presence of antiferromagnetic order
• Quantum transport through a quantum dot side-coupled to a Majorana bound state pair in the presence of electron-phonon interaction
• Majorana molecules and their spectral fingerprints
• Majorana differential shot noise and its universal thermoelectric crossover
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• Entanglement measures of Majorana bound states
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• Probing Majorana zero modes by measuring transport through an interacting magnetic impurity
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• Thermoelectric fluctuations of interfering Majorana bound states
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• Exactly solvable Majorana-Anderson impurity models
• Majorana Bound States hallmark in a quantum topological interferometer ring
• Currents and current correlations in a topological superconducting nanowire beam splitter
• Properties of dissipative Floquet Majorana modes using a quantum dot
• Fano fingerprints of Majoranas in Kitaev dimers of superconducting adatoms
• Continuous unitary transformation approach to the Kondo-Majorana interplay
• Revealing universal Majorana fractionalization using differential shot noise and conductance in nonequilibrium states controlled by tunneling phases
• Creating and detecting poor man's Majorana bound states in interacting quantum dots
• Fluctuation response of a minimal Kitaev chain in nonequilibrium states
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