Integrating Superconducting Qubits with Two-dimensional Electron Systems

Project Information

SQALE

Grant agreement ID: 750777

DOI

10.3030/750777

Project terminated on 31 December 2018

EC signature date 23 February 2017

Start date 1 March 2017

End date 28 February 2019

Funded under

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Total cost

€ 200 194,80

EU contribution

€ 200 194,80

Coordinated by

KOBENHAVNS UNIVERSITET
Denmark

Periodic Reporting for period 1 - SQALE (Integrating Superconducting Qubits with Two-dimensional Electron Systems)

Reporting period: 2017-03-01 to 2019-02-28

Summary of the context and overall objectives of the project

Computers that use quantum superposition and entanglement are set to revolutionise how the world stores, processes, and communicates information. At the heart of quantum computers are building blocks known as qubits. Despite huge progress over the last decade, building a large number of interacting qubits still remains a major challenge. One emerging solution makes use of the semiconductor switch technology that is behind ordinary computer chips found in mobile phones and laptops. Proof-of-concept devices have proved extremely promising, but integrating these new materials in a scalable fashion needed to be established. In this project we addressed this by fabricating scalable hybrid circuits from these new materials and testing their performance.

Work performed from the beginning of the project to the end of the period covered by the report and main results achieved so far

I was able to readout the state of different types of qubits using microwave spectroscopy and demonstrate coherence times in the few μs range. Using the deeper direct knowledge of quantum control techniques and experience working directly with industrial partners I am now establishing a group to work in this area.

Progress beyond the state of the art and expected potential impact (including the socio-economic impact and the wider societal implications of the project so far)

By developing a new type of qubit we progressed beyond state-of-the-art and helped the prospects for scaling superconducting quantum computing beyond a few hundred qubits. The transformative impact is hard to overstate due to the expectation from European governments, industry, and increasingly the public, to be able to harness the power of quantum computing for protecting secure communications and simulating small molecules within the next decade.

Array of superconducting qubits and comparison between transmon, nanowire and 2DEG gatemon.