Innovative solutions for quantum error correction are needed to implement quantum computing, which requires the use of hundreds of logical qubits in a fault-tolerant manner. Researchers from our group, in collaboration with the theory team of Professor Markus Müller at RWTH Aachen University and Forschungszentrum Jülich, have now demonstrated a technique that makes it possible to perform a quantum operation between superconducting logical qubits while correcting for potential errors occurring during the operation. The results were just published in Nature Physics. This demonstration of lattice surgery on superconducting qubits marks an important step towards the ambitious goal of building useful quantum computers.

The Quantum Device Lab has been granted the project SuperMOOSE by IARPA, the US research funding agency. Coordinated by our group, the project aims to establish a connection between two error-corrected qubits, laying the foundation for future quantum computers. Our team collaborates with researchers from MIT, Forschungszentrum Jülich, Université de Sherbrooke in Canada and two industry partners, Zurich Instruments and Atlantic Quantum.

Researchers from our group have demonstrated that superconducting circuits separated by a cryogenic link spanning a distance of 30 metres can be much more strongly correlated with each other than is possible classically. This loophole-free Bell test firmly establishes non-locality is a resource in quantum information technology based on superconducting circuits.