Rigetti Computing

Today Rigetti announced the public launch of its 84-qubit Ankaa™-3 system. Ankaa-3 is Rigetti’s newest flagship quantum computer featuring an extensive hardware redesign that enables superior performance. Rigetti also celebrates major two-qubit gate fidelity milestones with Ankaa-3: successfully halving error rates in 2024 to achieve a median 99.0% iSWAP gate fidelity, as well as demonstrating 99.5% median fidelity fSim gates. Ankaa-3 is now available to its partners via the Rigetti Quantum Cloud Services platform (QCS®) and will be coming to Amazon Braket and Microsoft Azure in the first quarter of 2025. Users will be able to operate these higher fidelity and universal iSWAP gates for a wide range of algorithmic research, with a median gate time of 72 nanoseconds. The faster (median 56 nanoseconds), more specialized fSim gates are useful for specific algorithms such as random circuit sampling, as recently demonstrated on Google’s Willow system.  Learn more about Rigetti's newest system and the technology enhancements made across the technology stack in our press release: https://lnkd.in/eEPGaV-e

ICYMI: Rigetti was proud to take part in NVIDIA’s first-ever Quantum Day at #GTC25 last month. Rigetti CEO Dr. Subodh Kulkarni joined industry leaders on stage for a robust conversation about the future of quantum computing. Moderated by NVIDIA CEO Jensen Huang, the discussion explored how quantum computing could transform the way we solve some of the world’s toughest challenges. Catch the full panel here: https://lnkd.in/ebGfkb4M

It was a pleasure to present at the National Quantum Computing Centre (NQCC)'s scalability conference last week on the work that we at Rigetti Computing have been doing in collaboration with the NQCC and Riverlane on quantum error correction

Congratulations to the NVIDIA collaborators accepted into the Defense Advanced Research Projects Agency (DARPA)'s Quantum Benchmarking Initiative, including: Alice & Bob, Atlantic Quantum, Atom Computing, Diraq, Hewlett Packard Enterprise, IonQ, Oxford Ionics, Quantum Motion, Quantinuum, Rigetti Computing and Xanadu.👏 🎉 We are excited to celebrate the great work these companies do to develop useful #quantum computers. https://nvda.ws/4i3Uo2P

Rigetti is proud to be selected for Defense Advanced Research Projects Agency (DARPA)’s Quantum Benchmarking Initiative, and we are thrilled to see Barron's highlight why this moment matters. The story gets to the core of what quantum R&D looks like. This work is not about immediate commercialization. It is about tackling the technical challenges that stand between today’s systems and future utility-scale quantum computing. As Rigetti CEO Dr. Subodh Kulkarni has emphasized, reaching that scale will take time, commitment, and collaboration between government, industry, and researchers. We are excited to help drive that progress! Read the full story in Barron’s: https://lnkd.in/ehZwrUaY

Fault-tolerant quantum computing will likely require 10,000 to a million physical qubits. Scaling these systems is challenging because they require bulky microwave components with high thermal loads that can quickly overwhelm the cooling power of a dilution refrigerator, a core  component of a superconducting quantum computing system. Optical signals, on the other hand, have a considerably smaller footprint and negligible thermal conductivity. We’re pleased to share that our joint paper with Harvard University, Massachusetts Institute of Technology, and University of Chicago, “Coherent control of a superconducting qubit using light,” has been published in Nature Physics. This paper details how we integrated a hybrid microwave-optical quantum transducer with a Rigetti-fabricated superconducting qubit. This hybrid set-up enables optical control of the qubit, removing the need for coax lines altogether. Successfully connecting a superconducting qubit to an optical system is a promising step towards scaling to higher qubit count systems necessary for fault tolerance. Learn more in our paper: https://lnkd.in/gibHAXsP

🚀 Rigetti is honored to be a part of this important program to develop and validate our utility-scale quantum computer concept based on our modular chip architecture and scalable quantum error correction codes alongside Riverlane!

We are thrilled to announce that Rigetti was selected to participate in Defense Advanced Research Projects Agency (DARPA)’s Quantum Benchmarking Initiative (QBI)!  The objective of DARPA’s QBI program is to verify and validate that quantum computing can achieve utility-scale operation by 2033. Rigetti will advance to Stage A, a 6-month performance period focused on our utility-scale quantum computer (USQC) concept that combines our proprietary multi-chip architecture with scalable quantum error correction (QEC) codes. We’ll be collaborating with Riverlane on this project, who will be leveraging their QEC expertise to help refine our USQC concept and validate the underlying technology.  “Rigetti has spent the last decade developing the IP and expertise needed to build and deliver high-performing quantum computers. The DARPA QBI sets out to prove a realistic path to quantum utility, which we believe we are well positioned to deliver,” says Dr. Subodh Kulkarni, Rigetti CEO. “The DARPA QBI program is closely aligned with Rigetti's technology roadmap, which includes building out our QEC capabilities and developing fault-tolerant architectures.” https://lnkd.in/ecH38VyC

Quantum computing is still in a crucial R&D phase as we move closer to building fault-tolerant systems. After his panel at NVIDIA’s GTC Quantum Day, our CEO Dr. Subodh Kulkarni sat down with Barron's to talk about Rigetti’s practical approach to the quantum market and why government-backed projects are key to driving progress. Read the full article: https://lnkd.in/gxZaEDyc

David Rivas, CTO of Rigetti Computing joined me to discuss Rigetti’s approach to building superconducting quantum computers. He highlights the company’s full-stack capabilities, including its captive quantum fab and proprietary control systems, emphasizing the advantages of vertical integration for optimizing performance. David explains Rigetti’s chiplet-based approach to scaling quantum processors, a key strategy for achieving large-scale, fault-tolerant quantum computing. He also introduces the Novara QPU, a modular 9-qubit system designed for flexibility and interoperability with third-party hardware and software. The conversation covers the evolution of quantum computing architectures, Rigetti’s move to 3D signaling for better qubit connectivity, and the role of logical qubits in scaling quantum processors. David reflects on the importance of continued hands-on experimentation, comparing today’s quantum computing landscape to the early days of classical computing. He also shares insights into the challenges of being a public company, the necessity of clear technical progress over short-term sales metrics, and the impact of emerging error correction techniques on the industry. Audio: https://lnkd.in/d-_KTuTR Transcript: https://lnkd.in/dsVk4nfB