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Investing.com -- Rigetti Computing, Inc. (NASDAQ:RGTI), a front-runner in full-stack quantum-classical computing, has announced its involvement in the Defense Advanced Research Projects Agency (DARPA) Quantum Benchmarking Initiative (QBI). The initiative aims to validate the utility-scale operation of quantum computing by 2033. Rigetti will be part of the initial stage of this multi-stage program, a six-month performance period focused on its utility-scale quantum computer concept. Successful completion of the program milestones could earn the company up to $1 million.
The QBI program aims to scrutinize various approaches to quantum computing to determine their potential for utility-scale operation. Rigetti’s proposal for a Utility-Scale Quantum Computer (USQC) involves a combination of the company’s proprietary multi-chip architecture and scalable quantum error correction (QEC) codes. Rigetti’s long-time collaborator, Riverlane, a leader in QEC technology, will be involved in the project to refine the proposed USQC concept and validate the technology.
A USQC, as defined by DARPA, is a system where the computational value outweighs the costs. The physical qubit architecture and QEC code are the primary factors determining the scalability and speed of a USQC. Rigetti’s concept plans to use Quantum Low Density Parity Check (qLDPC) codes, which require less physical qubit overhead, making them a more efficient QEC technique for scaling towards fault-tolerant systems.
Dr. Subodh Kulkarni, Rigetti CEO, stated that the company’s decade-long experience in developing high-performing quantum computers positions them well to deliver on DARPA’s QBI objective. Rigetti’s roadmap aligns closely with the QBI program, focusing on developing their QEC capabilities and fault-tolerant architectures.
Rigetti’s quantum computers are based on superconducting qubits, favored for their fast gate speeds and compatibility with established semiconductor manufacturing techniques. The company has made several breakthroughs in the superconducting qubit industry, including a novel chip fabrication technique, Alternating Bias Assisted Annealing (ABAA), and innovative multi-chip architecture technology. Rigetti has also deployed quantum systems that utilize vertical I/O, multiple layers of signal lines, and the ability to connect qubits on separate chips with high fidelity.
David Rivas, Rigetti CTO, expressed confidence in the company’s ability to meet DARPA’s 2033 target. The company’s strategy to achieve a USQC involves implementing an efficiently-scaling qLDPC code in hardware, combining speed and efficiency. Rigetti plans to manufacture quantum integrated circuits capable of natively running qLDPC codes, reaching the high qubit counts and performance metrics required for utility-scale applications.
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