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A new approach to quantum error correction
By exploiting our hardware’s sparse photonic connectivity, we’re redefining which quantum error-correction codes are attainable or practical and are defining blueprints for efficient distributed quantum computing architectures.
This approach represents a shift from QEC codes limited to local connections, opening new routes to fault-tolerance via modularity and distributed quantum entanglement. Our recent research paper in distributed QEC demonstrates how a modular quantum computing architecture of interconnected processors is compatible with high-rate and efficient quantum error correction codes, charting a path towards fault-tolerant distributed quantum computing.
This theory work has three significant implications: showing that distributed-QEC of modular quantum computing systems is possible, that the network requirements for an error-corrected distributed system are feasible, and that distributed QEC is at least as efficient as other monolithic QEC strategies. The paper charts a path to build a modular system architecture where many relatively small QPU cores (~100 qubits) are connected via a sparse network with realistic interconnect performance to efficiently create an arbitrarily large fault-tolerant machine.
Since early 2024, we have collaborated with Canadian company softwareQ to develop the blueprint of a Modular Fault-Tolerant Quantum Computer, as part of a joint project funded by Innovate UK and the National Research Council of Canada.
Links:
Technical paper: Distirbuted quantum error correction based on hyperbolic Floquet codes