Distributed Quantum Computing in Silicon

Quantum technology will unlock commercially viable applications once scalable, distributed, fault-tolerant quantum systems emerge. Modularity will likely underpin such quantum systems, as a modular quantum architecture can provide the number of qubits and gates required at a lower technical cost [1]. From this modularity paradigm emerges requirements for both high quantity and quality IO, and high qubit connectivity to implement high efficiency quantum LDPC error correction codes.

Photonic’s architecture is competitively positioned to address these challenges, building on the T centre spin-photon interface as a quantum system that enables both quantum computation and quantum networking. The T centre is a spin defect in silicon – providing access to a mature device fabrication industry – with an optical transition in the telecommunication band and long- lived electron and nuclear spins. We demonstrate generation of entanglement between remote T centres and its consumption by a teleported gate sequence, a key milestone towards remote quantum operations. Finally, we determine a path to high fidelity, high bandwidth entanglement generation using the Photonic platform [2].

[1] S. Simmons, https://arxiv.org/pdf/2311.04858.pdf (2023).

[2] Photonic Inc, https://arxiv.org/pdf/2406.01704 (2024).