Wafer-scale fabrication and room-temperature experiments on graphene-based gates for quantum computation

TL;DR

This paper demonstrates wafer-scale fabrication of graphene-based devices capable of functioning as quantum gates at room temperature, confirming their suitability for quantum computation through experimental measurements.

Contribution

It introduces a novel wafer-scale fabrication process for graphene quantum devices and verifies their quantum computational potential at room temperature.

Findings

Charge carriers exhibit (quasi-)ballistic transport in fabricated devices.

Devices are smaller than the room-temperature mean-free-path in graphene.

Graphene configurations are suitable for room-temperature quantum computation.

Abstract

We have fabricated at wafer scale graphene-based configurations suitable for implementing at room temperature one-qubit quantum gates and a modified Deutsch-Jozsa algorithm. Our measurements confirmed the (quasi-)ballistic nature of charge carrier propagation through both types of devices, which have dimensions smaller than the room-temperature mean-free-path in graphene. As such, both graphene-based configurations were found to be suitable for quantum computation. These results are encouraging for demonstrating a miniaturized, room-temperature quantum computer based on graphene.