An experimentally accessible quality factor for Majorana wires

Abstract

Spin-orbit coupled semiconducting nanowires with proximity-induced superconductivity are expected to host Majorana zero modes at their endpoints when a sufficiently strong magnetic field is applied. The resulting phase would be a one-dimensional topological superconductor. However, while a variety of experiments have been performed observing a zero bias conductance peak (suggestive of Majorana zero modes), the topological nature of these physical systems is still a subject of debate. Here we suggest a quantitative test of the degree to which a system displaying a zero bias peak may be considered topological. The experiment is similar to previous measurements of conductance, but is performed with the aid of a quantum dot at the wire's end. We arrive at the surprising result that the non-local nature of the topological system may be identified through a local measurement.

4+ pages, 3 Figures

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Cited by in corpus (70)

• Realizing Majorana zero modes in superconductor-semiconductor heterostructures
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• Nonlocality of Majorana Modes in Hybrid Nanowires
• Reproducing topological properties with quasi-Majorana states
• Physical mechanisms for zero-bias conductance peaks in Majorana nanowires
• Next steps of quantum transport in Majorana nanowire devices
• Zero-field Topological Superconductivity in Ferromagnetic Hybrid Nanowires
• Majorana nanowires for topological quantum computation
• Distinguishing topological Majorana bound states from trivial Andreev bound states: Proposed tests through differential tunneling conductance spectroscopy
• Nonlocal conductance spectroscopy of Andreev bound states: Symmetry relations and BCS charges
• Quantifying wave-function overlaps in inhomogeneous Majorana nanowires
• Three-terminal nonlocal conductance in Majorana nanowires: Distinguishing topological and trivial in realistic systems with disorder and inhomogeneous potential
• A two-site Kitaev chain in a two-dimensional electron gas
• Roadmap towards Majorana qubits and nonabelian physics in quantum dot-based minimal Kitaev chains
• Spin-dependent zero-bias peak in a hybrid nanowire-quantum dot system: Distinguishing isolated Majorana fermions from Andreev bound states
• Closing of the Induced Gap in a Hybrid Superconductor-Semiconductor Nanowire
• Plateau regions for zero-bias peaks within 5% of the quantized conductance value $2e^2/h$
• Probing Majorana localization in minimal Kitaev chains through a quantum dot
• Braiding Majorana zero modes using quantum dots
• Dephasing and leakage dynamics of noisy Majorana-based qubits: Topological versus Andreev
• Majorana oscillations modulated by Fano interference and dregree of non-locality in a topological superconducting nanowire-quantum dot system
• Metamorphosis of Andreev bound states into Majorana bound states in pristine nanowires
• Interaction-induced zero-energy pinning and quantum dot formation in Majorana nanowires
• Universal Majorana thermoelectric noise
• Tuning of heat and charge transport by Majorana fermions
• Topological superconductivity and Majorana states in low-dimensional systems
• Recent progress on Majorana in semiconductor-superconductor heterostructures--Engineering and detection
• Majorana/Andreev crossover and the fate of the topological phase transition in inhomogeneous nanowires
• Dynamic Majorana resonances and universal symmetry of nonequilibrium thermoelectric quantum noise
• Interaction induced hybridization of Majorana zero-modes in a coupled quantum-dot hybrid-nanowire system
• Absence of supercurrent sign reversal in a topological junction with a quantum dot
• Transport signatures of Majorana bound states in superconducting hybrid structures
• Control and detection of Majorana bound states in quantum dot arrays
• Effects of decoherence on diabatic errors in Majorana braiding
• Experimental review on Majorana zero-modes in hybrid nanowires
• Signatures of the Majorana spin in electrical transport through a Majorana nanowire
• Topological isoconductance signatures in Majorana nanowires
• Detecting Majorana modes by readout of poisoning-induced parity flips
• Can non-local conductance spectra conclusively signal Majorana zero modes? -- Insights from von Neumann entropy
• Accessing the degree of Majorana nonlocality in a quantum dot-optical microcavity system
• Charge sensing the parity of an Andreev molecule
• Machine-learned tuning of artificial Kitaev chains from tunneling-spectroscopy measurements
• Reshaping the Jaynes-Cummings ladder with Majorana bound states
• Manifestation of Majorana modes overlap in the Aharonov-Bohm effect
• Spin-resolved spectroscopy using a quantum dot defined in InAs 2DEG
• The influence of the Majorana non-locality on the supercurrent
• Multi-level effects in quantum-dot based parity-to-charge conversion of Majorana box qubits
• Transverse profile and 3D spin canting of a Majorana state in carbon nanotubes
• Interaction-induced strong zero modes in short quantum dot chains with time-reversal symmetry
• Edge states, Majorana fermions and topological order in superconducting wires with generalized boundary conditions
• Dynamical approach to improving Majorana qubits and distinguishing them from trivial bound states
• Stabilization of a Majorana Zero Mode through Quantum Frustration
• Subgap states in semiconductor-superconductor devices for quantum technologies: Andreev qubits and minimal Majorana chains
• Nonlocal correlations transmitted between quantum dots via short topological superconductor
• Photonic cross-noise spectroscopy of Majorana bound states
• Probing Majorana bound states via a pn-junction containing a quantum dot
• Anomalous proximity effect under Andreev and Majorana bound states
• 4$\pi$ and 8$\pi$ dual Josephson effects induced by symmetry defects
• Distinguishing Majorana bound states from Andreev bound states through differential conductance and current noise spectrum
• Fingerprints of Majorana bound states in quantum-rings
• Phase-controlled quantum transport signatures in a quantum dot-Majorana hybrid ring system
• Phase transitions in quantum dot-Majorana zero mode coupling systems
• Exactly solvable Majorana-Anderson impurity models
• Effect of interatomic repulsion on Majorana zero modes in a coupled quantum-dot-superconducting-nanowire hybrid system
• Super-Poissonian noise from quasiparticle poisoning in electron transport through a pair of Majorana bound states
• Characterizing local Majorana properties using Andreev states
• Quantifying robustness and locality of Majorana bound states in interacting systems
• Odd-frequency Pairing in Josephson Junctions Coupled by Magnetic Textures
• Entanglement dynamics in minimal Kitaev chains
• Nonlocal signatures of hybridization between quantum dot and Andreev bound states