Projects - GROOVE Quantum

EIC Transition: GROOVE

Germanium quantum processors: more, robust, available!

Project summary

In this EIC Transition project, we aim to develop a robust framework enabling germanium semiconductor quantum technology to scale. The main objective of GROOVE is to reproducibly fabricate, test and launch a quantum chip containing 16 high-quality germanium spin qubits. This quantum computer prototype will leverage the small footprint and rapid development of spin qubits in gate-defined quantum dots in combination with the unique properties of the germanium host material. As our research to date has demonstrated promising results for high-quality qubits in germanium, we aim to explore the robustness and scalability that are essential for further scaling. Scientific research often focuses on hero devices and a one-off demonstration of high-fidelity or multi-qubit milestones, with the different state-of-the-art performance metrics (qubit initialisation, operation, entanglement, readout) being achieved in a wide variety of devices. However, for further scaling it is absolutely essential that these quality requirements are consistently achieved in a single device. We strive to make the platform robust by developing high-yield and highly reproducible sample fabrication where all qubits conform to a high minimal fidelity.

PROJECT OBJECTIVE

The activities within the project can be categorised by the following measurable key objectives: More, Robust, Available.

Develop a 16-qubit germanium quantum processor.

Robust

Ensure the robustness of the design and fabrication process by ensuring high-yield and reproducible chip fabrication with high-fidelity qubits.

Available

Implement a method for key users to access our systems and receive continuous feedback.

With these objectives in mind, GROOVE positions Europe in a unique way to build and commercialise large-scale germanium-based quantum computers. To reach our ambition, we have identified key technological and scientific milestones, including stringent qubit performance requirements, reliable and reproducible QPU manufacturing, and automated calibration and operation.

SCIENTIFIC RESULTS

Operating semiconductor quantum processors with hopping spins
Chien-An Wang, Valentin John, Hanifa Tidjani, Cécile X. Yu, Alexander Ivlev, Corentin Déprez, Floor van Riggelen-Doelman, Benjamin D. Woods, Nico W. Hendrickx, Will I. L. Lawrie, Lucas E. A. Stehouwer, Stefan Oosterhout, Amir Sammak, Mark Friesen, Giordano Scappucci, Sander L. de Snoo, Maximilian Rimbach-Russ, Francesco Borsoi, Menno Veldhorst