Scalable approaches for many-qubit devices


Principal Investigator: Hendrik Bluhm

Concept for a scalable quantum processor architecture Copyright: © Hendrik Bluhm

The main goal of this project is to explore a highly scalable approaches based on cryogenic electronics for controlling quantum-dot spin-qubit devices. Specifically, we aim at using cryogenic DC voltage sources that are custom designed at the Central Institute Electronic Systems (ZEA-2), at Research Center Jülich. These will be flip-chip bonded to qubit devices to bias the electrostatic confinement gates for the quantum dots. Our goal is to demonstrate a device with 50 independently tunable qubits. The figure schematically shows the vision motivating this approach. Furthermore, we are developing fully automated tuning procedures which will be tested on this device to determine their reliability (see also Software Projects).

In addition, in collaboration with IMEC, we are exploring the feasibility of foundry-based fabrication processes for the realization of Si-based spin qubits.

A list of related group publications is given below (see External Links).