  Quantum computing is a disruptive paradigm widely believed to be capable of
solving classically intractable problems. However, the route toward full-scale
quantum computers is obstructed by immense challenges associated with the
scalability of the platform, the connectivity of qubits, and the required
fidelity of various components. One-way quantum computing is an appealing
approach that shifts the burden from high-fidelity quantum gates and quantum
memories to the generation of high-quality entangled resource states and high
fidelity measurements. Cluster states are an important ingredient for one-way
quantum computing, and a compact, portable, and mass producible platform for
large-scale cluster states will be essential for the widespread deployment of
one-way quantum computing. Here, we bridge two distinct fields---Kerr
microcombs and continuous-variable (CV) quantum information---to formulate a
one-way quantum computing architecture based on programmable large-scale CV
cluster states. The architecture can accommodate hundreds of simultaneously
addressable entangled optical modes multiplexed in the frequency domain and an
unlimited number of sequentially addressable entangled optical modes in time
domain. One-dimensional, two-dimensional, and three-dimensional CV cluster
states can be deterministically produced. We note cluster states of at least
three dimensions are required for fault-tolerant one-way quantum computing with
known error-correction strategies. This architecture can be readily implemented
with silicon photonics, opening a promising avenue for quantum computing at a
large scale.
