Superconducting transistors: A boost for quantum computing

TL;DR

This paper introduces a superconducting nanodevice based on niobium titanite nitride that functions as a Cooper-pair transistor with a long parity lifetime, potentially enhancing quantum computing technologies.

Contribution

It demonstrates a superconducting nanodevice with a gate-tunable Josephson current and an unprecedented parity lifetime suitable for quantum computing applications.

Findings

Parity lifetime exceeds one minute at near-zero temperatures

Gate voltage effectively modulates the Josephson critical current

Potential applications in quantum computing hardware

Abstract

A niobium titanite nitride-based superconducting nanodevice in which the Josephson critical current can be modulated by a gate voltage - a Cooper-pair transistor - has proven a remarkably long parity lifetime exceeding one minute at temperatures close to absolute zero.