IBM Moves Towards Industrially Fault-Tolerant Quantum Computing by 2033, Reaching a Critical Phase in the DARPA Quantum Benchmarking Initiative
DARPA QBI Quantum
IBM confirmed today that it has been selected for Stage B of the Quantum Benchmarking Initiative (QBI), marking a major milestone in the company’s quest for large-scale quantum computing. The goal of QBI, which is being led by the US Defense Advanced Research Projects Agency (DARPA), is to thoroughly assess and verify different international strategies in order to create an industrially fault-tolerant quantum computer by 2033.
Developed by the U.S. Department of Defense’s independent research and development agency, DARPA, the QBI was introduced in 2024. Ultimately, the research aims to ascertain whether building a quantum computer with computational value greater than its cost—known as “utility-scale operation”—is feasible.
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The statement was announced by IBM Research Director Jay Gambetta, who said that IBM’s move to Stage B provides “a firm validation of IBM’s approach to delivering a large-scale, fault-tolerant quantum computer.” “IBM has made public its detailed plan and roadmap to scale quantum computers towards fault-tolerance,” he said, adding that he looks forward to working with DARPA as they conduct an objective examination of possible techniques throughout the field.
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The Crucial Next Stage: Stage B Prerequisites
The three crucial phases of QBI are designed to assess performers’ efforts on different timeframes. IBM announced its entry into the second phase, Stage B, on November 6, 2025.
Participants in Stage A, which was announced in April 2025, had to demonstrate a preliminary technical concept of a fault-tolerant, affordable quantum computer with a likely near-term route to realization.
Stage B is already under progress and will take a full year. It required a thorough research and development strategy that might make the utility-scale quantum computer a reality. Along with outlining suggested mitigation measures and identifying the required risk-reduction prototypes, performers in Stage B are also required to describe the risks connected to their proposals. These R&D plans will be carefully reviewed by the QBI team to make sure businesses are on track to reach the important 2033 deadline as well as short-term goals.
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As part of the program, IBM, whose qubit technology approach combines quantum computing with modular superconducting processors, is also working with SEEQC to investigate new methods for scaling control systems for quantum computers.
Performers who advance from Stage B will be asked to Stage C. In stage C, the QBI independent verification and validation (IV&V) team will test the computer hardware of the companies to verify that the utility-scale quantum computer concept can be built as intended and function as intended.
A Worldwide Field of Various Methods
IBM is one of the eleven businesses that DARPA has chosen to enter Stage B. This pool reflects the current difficulty in assessing quantum computing, as there is currently no single dominant design, in contrast to classical computing. It represents a broad range of technological approaches.
Since the initiative is not a competition meant to select a select few “winners,” the QBI team is interested in exploring all feasible strategies for which financing is available. The goal is to assess each company’s strategy according to its individual strengths.
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The following qubit technology and the businesses chosen for Stage B demonstrate this architectural diversity:
- Atom Computing (Boulder, Colorado): Neutral atom arrays that can be scaled
- Iraq (Sydney, Australia): Silicon CMOS spin qubits; also operates in Palo Alto, California, and Boston, Massachusetts
- IBM: Using modular superconducting processors for quantum computing (Yorktown Heights, New York)
- IonQ: Trapped-ion quantum computing and located in College Park, Maryland
- Nord Quantique: Superconducting qubits with bosonic error correction (Sherbrooke, Quebec, Canada)
- Photonic Inc. (Canada, Vancouver, British Columbia): Spin qubits made of silicon that are optically connected
- The architecture of Quantinuum (Broomfield, Colorado) uses trapped-ion quantum charge-coupled devices (QCCDs).
- Quantum Motion: silicon spin qubits based on MOS (London, UK)
- Boston, Massachusetts-based QuEra Computing: Qubits for neutral atoms
- Silicon Quantum Computing Pty. Ltd. (Australian, Sydney): Silicon precision atom qubits
- In Toronto, Canada, Xanadu offers photonic quantum computing.
Due of the companies’ different entry dates into the review process, DARPA expects that more teams may move on to stages A, B, and C.
Validation for National Security Without Prejudice
QBI provides objective third-party verification and validation of the Stage B performers’ tactics, thereby supporting their continuous research and development activities. To fully grasp the technology’s potential, this in-depth analysis is seen to be essential.
The Quantum Benchmarking (QB) initiative is related to the DARPA Underexplored Systems for Utility-Scale Quantum Computing (US2QC) program, which is expanded into the QBI program. Whereas QBI aims to build a practical quantum computer by 2033, the QB program aims to establish the impact metric. To put it simply, QB poses the fundamental query: “What would be possible that a standard computer cannot do if a fully functional quantum computer appeared magically?”
Leading worldwide provider of business services, AI, and hybrid cloud, IBM assists customers in more than 175 nations in using data insights. Their dedication to accountability and trust supports their advancements in AI, cloud computing, and industry-specific solutions. The effective development of IBM and its international counterparts in the QBI will assist convey measurable outcomes to U.S. government stakeholders and progress the field of quantum computing as a whole from theoretical promise to practical application.
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