Josephson junctions in double nanowires bridged by in-situ deposited superconductors

Abstract

We characterize parallel double quantum dot Josephson junctions based on closely-grown double nanowires bridged by in-situ deposited superconductors. The parallel double dot behavior occurs despite the closeness of the nanowires and the potential risk of nanowire clamping during growth. By tuning the charge filling and lead couplings, we map out the simplest parallel double quantum dot Yu-Shiba-Rusinov phase diagram. Our quasi-independent two-wire hybrids show promise for the realization of exotic topological phases. II. CHARACTERIZATION OF THE PARALLEL QUANTUM-DOT JOSEPHSON JUNCTIONIn this section, we outline the device layout and demonstrate the Josephson effect and weak interdot tunnelling

Majorana Braiding Racetracks from Charge Chern Insulator - Superconductor Hybrids

“…In fact, these two quantities satisfy a scaling relation which can provide a clearer signature of the underlying MZMs. We note that our results have a generic character and may find application in other racetrack-like platforms, these including the double-nanowires setups experimentally realized recently [86][87][88].…”

“…where becomes quantized and equal to 2e 2 /h at V = 0, similar to the single-lead differential conductance dI/dV . Concluding this paragraph, we point out that the above conclusions hold for a generic two-track system, including double-nanowire hybrids [86][87][88], as long as one can controllably transfer the spectral weight of each MZM from one track/nanowire to the other.…”