Observation of Conductance Quantization in InSb Nanowire Networks

TL;DR

This paper reports the observation of conductance quantization in InSb nanowire networks, indicating ballistic transport, which is promising for realizing Majorana zero modes for topological quantum computing.

Contribution

It demonstrates conductance quantization in InSb nanowire networks, providing evidence of low disorder and ballistic transport crucial for Majorana-based quantum devices.

Findings

Conductance quantization plateaus observed in nanowire networks

Evidence of ballistic transport in InSb nanowire junctions

Potential for topological quantum computing applications

Abstract

Majorana Zero Modes (MZMs) are prime candidates for robust topological quantum bits, holding a great promise for quantum computing. Semiconducting nanowires with strong spin orbit coupling offers a promising platform to harness one-dimensional electron transport for Majorana physics. Demonstrating the topological nature of MZMs relies on braiding, accomplished by moving MZMs around each other in a certain sequence. Most of the proposed Majorana braiding circuits require nanowire networks with minimal disorder. Here, the electronic transport across a junction between two merged InSb nanowires is studied to investigate how disordered these nanowire networks are. Conductance quantization plateaus are observed in all contact pairs of the epitaxial InSb nanowire networks; the hallmark of ballistic transport behavior.