Role of dissipation in realistic Majorana nanowires

Abstract

We carry out a realistic simulation of Majorana nanowires in order to understand the latest high- quality experimental data [H. Zhang et al., arXiv:1603.04069 (2016)] and, in the process, develop a comprehensive picture for what physical mechanisms may be operational in realistic nanowires leading to discrepancies between minimal theory and experimental observations (e.g., weakness and broadening of the zero-bias peak and breaking of particle-hole symmetry). Our focus is on understanding specific intriguing features in the data, and our goal is to establish matters of principle controlling the physics of the best possible nanowires available in current experiments. We identify dissipation, finite temperature, multi-sub-band effects, and the finite tunnel barrier as the four most important physical mechanisms controlling the zero-bias conductance peak. Our theoretical results including these realistic effects agree well with the best available experimental data in ballistic nanowires.

6 pages, 4 figures

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• Physical mechanisms for zero-bias conductance peaks in Majorana nanowires
• Non-Majorana states yield nearly quantized conductance in superconductor-semiconductor nanowire devices
• Disorder-induced zero-bias peaks in Majorana nanowires
• On controlling the bound states in quantum-dot hybrid-nanowire
• Quantum anomaly, non-Hermitian skin effects, and entanglement entropy in open systems
• Three-terminal nonlocal conductance in Majorana nanowires: Distinguishing topological and trivial in realistic systems with disorder and inhomogeneous potential
• Electron temperature and tunnel coupling dependence of zero-bias and almost-zero-bias conductance peaks in Majorana nanowires
• Charge impurity effects in hybrid Majorana nanowires
• Plateau regions for zero-bias peaks within 5% of the quantized conductance value $2e^2/h$
• Presence versus absence of end-to-end nonlocal conductance correlations in Majorana nanowires: Majorana bound states versus Andreev bound states
• Large zero bias peaks and dips in a four-terminal thin InAs-Al nanowire device
• Conductance spectroscopy on Majorana wires and the inverse proximity effect
• Phenomenology of soft gap, zero bias peak, and zero mode splitting in ideal Majorana nanowires
• Spin-polarized Andreev tunneling through the Rashba chain
• Suppressing Andreev bound state zero bias peaks using a strongly dissipative lead
• Dynamical generation of Majorana edge correlations in a ramped Kitaev chain coupled to nonthermal dissipative channels
• Experimental review on Majorana zero-modes in hybrid nanowires
• Role of dephasing on the conductance signatures of Majorana zero modes
• Differential current noise as an identifier of Andreev bound states that induce nearly quantized conductance plateaus
• Meissner effect induced Majorana zero modes at small magnetic field
• Josephson effect and critical currents in trivial and topological full-shell hybrid nanowires
• InAs/MoRe hybrid semiconductor/superconductor nanowire devices
• Effect of topological length on Bound states signatures in a Topological nanowire
• Germanium-based hybrid semiconductor-superconductor topological quantum computing platforms: Disorder effects
• Electron-boson-interaction induced particle-hole symmetry breaking of conductance into subgap states in superconductors
• Identifying Majorana vortex modes via non-local transport
• Dissipative dynamics of an impurity with spin-orbit coupling
• Josephson current via an isolated Majorana zero mode
• In situ tuning of dynamical Coulomb blockade on Andreev bound states in hybrid nanowire devices
• Particle-hole spectral asymmetry at the edge of multiorbital noncentrosymmetric superconductors
• Transport in extended Kitaev chain with time reversal symmetry breaking and long-range interaction
• Conductance matrix symmetries of multiterminal semiconductor-superconductor devices
• Topological signatures in a weakly dissipative Kitaev chain of finite length