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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Cited by in corpus (10)

• Scaling of Majorana Zero-Bias Conductance Peaks
• On controlling the bound states in quantum-dot hybrid-nanowire
• Quantum anomaly, non-Hermitian skin effects, and entanglement entropy in open systems
• Electron temperature and tunnel coupling dependence of zero-bias and almost-zero-bias conductance peaks in Majorana nanowires
• Presence versus absence of end-to-end nonlocal conductance correlations in Majorana nanowires: Majorana bound states versus Andreev bound states
• 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
• InAs/MoRe hybrid semiconductor/superconductor nanowire devices
• Topological signatures in a weakly dissipative Kitaev chain of finite length