Quantum Machines has announced that it is joining researchers at the University of Innsbruck, Ecole Normale Supérieure de Lyon, Mines ParisTech, Ecole Normale Supérieure de Paris, Karlsruher Institut für Technologie, French National Institute for Research in Computer Science and Automation and Romanian National Institute for Research and Development of Isotopic and Molecular Technologies on a three year project called QuCoS (Quantum Computation with Schödinger cat states) funded by the QuantERA consortium.
The significance of an error correction scheme based upon the Schrödinger cat state approach is that it potentially can be more efficient than other alternatives, such as the surface code. Whereas IBM and Google are estimating they will need a 1000 physical qubits for every logical qubit (e.g. a 1 million physical qubit machine would provide for 1000 logical qubits) for error correction, the Schrödinger cat state approach may only require a few hundred. Amazon is taking a similar approach which we covered in some detail earlier this month. If this type of error correction works, it could provide a significant advantage for a quantum computer since it would take fewer physical qubits to do the same amount of work.
More information about this project is available in a news release issued by Quantum Machines and available here.
July 29, 2021