Multiple cavity-coupled emitters for generating a graph state

A quantum computing method for generating a graph state, the method comprising:

• coupling a quantum emitter at each of a plurality of coupling locations, such that each of a plurality of quantum emitters is associated with a differing coupling location, wherein each coupling location is associated with a different one of a plurality of photonic cavities, and wherein quantum emitters associated with each coupling location are configured to mediate interactions between consecutive incoming photonic qubits to generate a graph state;
• supplying photons to the plurality of photonic cavities, wherein the photonic cavities are configured to couple photonic qubits to the quantum emitters;
• and
• outputting the graph state via a plurality of photon output channels downstream of the plurality of cavities.

A non-transitory computer-readable storage medium including instructions that, when executed by at least one processor, cause the at least one processor to carry out a quantum computing method, comprising:

• coupling a quantum emitter at each of a plurality of coupling locations, such that each of a plurality of quantum emitters is associated with a differing coupling location, wherein each coupling location is associated with a different one of a plurality of photonic cavities, and wherein quantum emitters associated with each coupling location are configured to mediate interactions between consecutive incoming photonic qubits to generate a graph state;
• supplying photons to the plurality of photonic cavities, wherein the photonic cavities are configured to couple photonic qubits to the quantum emitters;
• and
• outputting the graph state via a plurality of photon output channels downstream of the plurality of cavities.