The ScaleQIT project is specifically designed to develop a conceptual platform for potentially disruptive technologies, advance their scope and breadth and speed up the process of bringing them from the lab to the real world. Quantum bit (qubit) circuits based on Josephson junctions (JJs) have significantly progressed during the last five years, and they now constitute in the short/medium term the most promising route towards a solid-state quantum processor able to run quantum algorithms. Among the existing architectures, circuit quantum electrodynamics (circuit QED), coupling transmon-type charge qubits to microwave-frequency resonators, has met most of the criteria requested for a quantum processor: coherent qubits, initialization, high-fidelity gates, high-fidelity projective readout, initialization, and the first step of quantum error correction. The ScaleQIT concept is therefore to develop a platform for a scalable circuit QED quantum processor in accordance with the DiVincenzo criteria. Scalability of technology and computational functionality are major challenges ahead. These challenges are at the core of ScaleQIT: to develop a multi-qubit platform of transmons and resonator circuits running quantum algorithms and performing challenging quantum simulations. The ScaleQIT challenge also involves numerous theoretical issues: the gates, the quantum algorithms and more generally all quantum protocols including teleportation, feedback and error correction, the ultrastrong coupling regime, quantum simulation, and classical-quantum interfaces. Proposing new concepts, and evaluating their use in the context of our project, is also a key issue for the theoretical research.
Professor vid Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
Professor vid Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Professor vid Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
Grenoble Cedex 09, France
Funding Chalmers participation during 2013–2016