Multi-chip quantum computing processor solves scaling challenges

June 30, 2021 // By Rich Pell
Multi-chip quantum computing processor solves scaling challenges
Quantum computing company Rigetti Computing has announced what it says is the world's first scalable multi-chip quantum processor - an approach that promises to enable future quantum computing systems to scale in multiplicative ways.

The processor incorporates a proprietary modular architecture that is designed to accelerate the path to commercialization and solve key scaling challenges toward fault-tolerant quantum computers. The company says it expects to make an 80-qubit system powered by the multi-chip technology available on its Quantum Cloud Services platform later this year.

"We've developed a fundamentally new approach to scaling quantum computers," says Chad Rigetti, founder and CEO of Rigetti Computing. "Our proprietary innovations in chip design and manufacturing have unlocked what we believe is the fastest path to building the systems needed to run practical applications and error correction."

The company's technoloy is designed to address the inherent challenges in scaling quantum computers. As chips increase in size, there is a higher likelihood of failure and lower manufacturing yield, making it increasingly difficult to produce high-quality devices.

The company says it has eliminated these roadblocks by developing the technology to connect multiple identical dies into a large-scale quantum processor. This modular approach exponentially reduces manufacturing complexity and allows for accelerated, predictable scaling.

Marko Loncar, a Harvard professor of electrical engineering working on quantum hardware, who is familiar with the company’s work adds, "Scalability is a central objective across the entire quantum computing industry. Rigetti is the first to demonstrate an elegant, effective solution to this major technical challenge."

The multi-chip approach enables future systems to scale in multiplicative ways, says the company. Next-generation architectures currently in development at Rigetti include individual chips with more qubits, as well as advanced technologies to help connect more of these chips into larger processors.

Rigetti manufactures all of its chips at its California-based captive quantum foundry.

Rigetti Computing

Related articles:
Quantum cloud computing platform opens in public beta
Photonic quantum computing startup aims for 1M-qubit system
IBM unveils quantum technology roadmap
Intel unveils details of cryogenic quantum computing control chip


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