Rigetti achieves 99.5% fidelity on 36-qubit multi-chip quantum system

Rigetti Computing Inc. (NASDAQ: RGTI) achieved 99.5% median two-qubit gate fidelity on its modular 36-qubit quantum computing system, representing a 50% reduction in error rate compared to its previous 84-qubit single-chip Ankaa-3 system, according to a company statement.

The 36-qubit system comprises four 9-qubit chips connected through Rigetti's modular chip technology. The company plans to launch the system on August 15 and expects to release a 100+ qubit chiplet-based system at 99.5% median two-qubit gate fidelity before the end of 2025.

"We benefit from the many advantages of superconducting qubits, including gate speeds more than 1,000x faster than other modalities like ion trap and pure atoms, and scalability," said Dr. Subodh Kulkarni, Rigetti CEO. "By leveraging well-known techniques from the semiconductor industry, we've developed proprietary technology that we believe is critical to enable scaling to higher qubit count systems."

The Berkeley, California-based company has operated quantum computers over the cloud since 2017 and began selling on-premises quantum computing systems in 2021 with qubit counts between 24 and 84 qubits. Rigetti manufactures its chips at Fab-1, which the company describes as the industry's first dedicated quantum device manufacturing facility.

The company implemented CZ gates for the performance milestone, which are commonly used two-qubit gates for executing quantum circuits and have equivalent computational power to iSWAP gates.

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