Deterministic generation of a 20-qubit two-dimensional photonic cluster state

Understand

Multidimensional cluster states are a key resource for robust quantum communication, measurement-based quantum computing and quantum metrology.

• Here, we present a device capable of emitting large-scale entangled microwave photonic states in a two dimensional ladder structure.
• The device consists of a pair of coupled superconducting transmon qubits which are each tuneably coupled to a common output waveguide.
• This architecture permits entanglement between each transmon and a deterministically emitted photonic qubit.