Latest news with #qubit
South China Morning Post
2 days ago
- Science
- South China Morning Post
Chinese scientists build largest array of atoms for quantum computing in the world
A team led by renowned Chinese physicist Pan Jianwei has built a key component for an atom-based quantum computer, raising hopes it could be scaled up to an array using tens of thousands of the tiny building blocks. The approach taken by Pan and his team from the University of Science and Technology of China overcomes a major hurdle to atom-based quantum computing, according to a paper published last week in the peer-reviewed Physical Review Letters. The researchers designed an artificial intelligence system capable of arranging more than 2,000 rubidium atoms – each serving as a qubit, the two-state basic unit of quantum computing – into perfect patterns in a mere 60,000th of a second, it said. The milestone array was hailed by the paper's reviewers as 'a significant leap forward in computational efficiency and experimental feasibility within atom-related quantum physics', according to a press release on the university's website. Three main ways to build a quantum computer have emerged since the concept was first envisioned in the 1980s, with the atom-based approach considered especially promising. Unlike the alternatives, which use superconducting circuits or trapped ions as qubits, neutral atoms are more stable and easier to control in large numbers. However, atom-based systems have so far been limited to arrays of just a few hundred. In an atom-based quantum computer, the atoms are held in place by focused laser beams called optical tweezers, which manipulate their energy levels and link them to perform calculations.
Yahoo
02-08-2025
- Business
- Yahoo
Can Rigetti's Ankaa System Show Real World Value Beyond the Lab?
Rigetti Computing RGTI is beginning to close the gap between cutting-edge hardware and practical application—and the Ankaa system is central to that effort. In July 2025, the company unveiled a 36-qubit chiplet-based architecture that achieved 99.5% median two-qubit gate fidelity, effectively halving error rates compared to prior generations. This follows Ankaa-3, which also hit that same fidelity mark, demonstrating consistent progress across both single-chip and modular platforms. With plans to scale this architecture to 100+ qubits by the end of 2025, Rigetti is signaling that its roadmap is not just aspirational but also executable. These developments suggest that Ankaa is evolving into a platform that could eventually support commercial-grade quantum workloads. Earlier milestones also reinforce that momentum. Ankaa-2, Rigetti's 84-qubit system, was made publicly available on Amazon Braket in mid-2024, bringing it out of the lab and into the hands of developers and early adopters. The system delivered 98% median two-qubit fidelity and featured a square-lattice layout designed for better hybrid performance. In partnership with Riverlane, Rigetti also demonstrated real-time quantum error correction on Ankaa-2 with decoding speeds below one microsecond—a critical step toward fault-tolerance. While the company is still in early commercialization, the shift from internal testing to public access and real-time demonstrations shows Ankaa is starting to deliver value beyond experimental benchmarks. Peers Updates International Business Machines' IBM Quantum System Two, its most advanced quantum architecture to date, was first unveiled in December 2023. While the system marked a significant leap in modularity and scalability, its true relevance came into focus in mid-2025 when IBM deployed the first international unit at RIKEN in Japan. This deployment, integrated with the powerful Fugaku supercomputer, signals that IBM is not only advancing quantum hardware but also delivering it in production-ready, high-performance environments. IonQ IONQ has also moved from promise to delivery with the launch and commercial deployment of its Forte Enterprise system. Available through AWS Braket and its cloud, the system is now accessible to customers around the world. IonQ's focus on delivering algorithmic performance with strong coherence and fidelity metrics makes it an attractive option for early enterprise experimentation. While the full commercial impact is still developing, IonQ's ability to put systems in customers hands gives it a more visible path to scaling than peers still in limited-access or pilot stages. Rigetti's Price Performance, Valuation and Estimates Shares of RGTI have lost 3.7% in the year-to-date period against the industry's growth of 15.6%. Image Source: Zacks Investment Research From a valuation standpoint, Rigetti trades at a price-to-book ratio of 20.32, above the industry average. RGTI carries a Value Score of F. Image Source: Zacks Investment Research The Zacks Consensus Estimate for Rigetti's 2025 earnings implies a significant 86.1% rise from the year-ago period. Image Source: Zacks Investment Research The company currently carries a Zacks Rank #3 (Hold). You can see the complete list of today's Zacks #1 Rank (Strong Buy) stocks here. Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report International Business Machines Corporation (IBM) : Free Stock Analysis Report IonQ, Inc. (IONQ) : Free Stock Analysis Report Rigetti Computing, Inc. (RGTI) : Free Stock Analysis Report This article originally published on Zacks Investment Research ( Zacks Investment Research Error in retrieving data Sign in to access your portfolio Error in retrieving data Error in retrieving data Error in retrieving data Error in retrieving data
Fast Company
16-07-2025
- Business
- Fast Company
Rigetti Computing stock price: Why shares took a quantum leap today
Shares in the quantum computing firm Rigetti Computing are experiencing what you might call quantum leap. The Berkeley, California, company announced on Wednesday that it 'has achieved its mid-year performance milestone of 99.5% median [two-qubit gate fidelity] on its modular 36-qubit system.' What that means is that the company has managed to build the biggest modular quantum computer to date, and also cut its error rate in half—marking progress toward making quantum computers more viable for commercial users. Investors appear to see the news as further evidence that practical quantum computing is right around the corner, rather than decades away, as some have suggested. Following the announcement, Rigetti stock (NASDAQ: RGTI) saw a significant increase, rising more than 30% as of Wednesday afternoon. '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,' Rigetti CEO Subodh Kulkarni said in a statement. '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 company added that it plans to share additional updates when it releases its second-quarter 2025 operating results. Quantum computing is having an eventful year Even with AI sucking up the lion's share of attention from investors this year, quantum computing—which involves complex processes that can carry out tasks far faster than classical computers—has not gone unnoticed, although there is debate over when and to what extent advances in the space will yield world-changing results. Shares in the major publicly traded firms have remained somewhat volatile. With Rigetti's stock boost today, the company is trading at around $16.57 a share—a more than six-month high, but still lower than they were during a rally of quantum-related stocks at the end of last year. Other companies, such as Cisco, IBM, Microsoft, and Google are also in the quantum arms race, which could potentially lead to increased computing power on a massive scale, with a wide variety of potential use cases. Some companies, for example, are using them to develop new materials or drugs on time scales that dwarf existing development cycles. Quantum computing has remained largely theoretical until recently, but companies like Rigetti have been eager to share their developments backed by actual data. In March, quantum computing company D-Wave announced that it had achieved 'quantum supremacy.' The claim was challenged by researchers in Switzerland, but investors have rewarded D-Wave since then, particularly after the release of its Advantage2 system in May. Shares are up more than 191% over the last six months.
