QphoX, Rigetti, and NQCC Collaborate on Multi-Channel Optical Readout for Quantum Computing

QphoX, Rigetti Computing, and the National Quantum Computing Centre (NQCC) have collaborated to advance multi-channel optical readout of quantum processors, supported by a grant from RVO and Innovate UK via Eureka. This initiative aims to replace conventional microwave systems with light-based readouts transmitted over optical fiber, significantly reducing heat load on cryogenic systems and addressing key scaling challenges in quantum computing. The project involves QphoX scaling its optical system to interface with Rigetti’s 9-qubit Novera QPU, which will be hosted at the NQCC. This partnership seeks to demonstrate the feasibility of optical readout for a full-scale quantum processor, marking a crucial step toward overcoming bottlenecks in universal quantum computing.

Advancing Quantum Computing with Optical Readout Technology

In a groundbreaking collaboration, QphoX has teamed up with Rigetti and the National Quantum Computing Centre (NQCC) to develop innovative optical readout technology for quantum processing units (QPUs). This cutting-edge method leverages fiber optics to monitor qubits with unprecedented precision while significantly reducing energy loss. The project centers on microwave-to-optical transduction at cryogenic temperatures, a breakthrough that enhances scalability and performance compared to traditional methods.

Building on the success of a single-qubit demonstration, the initiative aims to integrate optical readout into Rigetti’s 9-qubit Novera processor. This advancement addresses critical thermal management challenges in cryogenic systems, thereby improving overall quantum computing efficiency. The project is generously funded by RVO and Innovate UK through the Eureka network, with each partner contributing their unique expertise: QphoX’s optical innovation, Rigetti’s processing capabilities, and NQCC’s research infrastructure.

Rigetti’s integration of optical readout technology into its 9-qubit Novera processor represents a significant step forward in refining qubit monitoring precision. By minimising energy dissipation and enhancing system scalability, this collaboration not only builds on the success of earlier demonstrations but also paves the way for more efficient quantum computing solutions.

This partnership underscores Rigetti’s commitment to exploring cutting-edge technologies that can revolutionize quantum computing by addressing thermal management challenges and elevating overall efficiency.