IBM Unveils 120-Qubit ‘Nighthawk r2’ Processor, Accelerating Path to Fault-Tolerant ‘Starling’ by 2029

September 6, 2026

IBM Quantum Blog USA

Overview

IBM has introduced its latest 120-qubit ‘Nighthawk r2’ processor, achieving a 25x improvement in circuit execution speed and significant reduction in qubit initialization errors. This advancement propels IBM’s roadmap to deliver a 200-logical-qubit fault-tolerant ‘Quantum Starling’ computer by 2029. The Nighthawk r2’s enhanced performance and reliability are critical steps toward making practical quantum computing a reality, broadening its potential applications across various industries.

In Depth

Key Findings

IBM has announced the launch of its new 120-qubit ‘Nighthawk r2’ processor, marking a significant stride in quantum computing performance. This advanced chip boasts a 25-fold increase in circuit execution speed and substantially reduced qubit initialization errors compared to its predecessors. Concurrently, IBM reiterated its ambitious plan to introduce ‘Quantum Starling,’ a fault-tolerant quantum computer featuring 200 logical qubits, by 2029, with ongoing progress reported on its modular cryogenic systems. These developments are crucial for scaling quantum technology and achieving reliable quantum computation.

Technical Details

The Nighthawk r2 processor leverages superconducting qubit technology, with its design focused on minimizing error rates and extending coherence times. The reduction in initialization errors is particularly vital for enhancing the fidelity and trustworthiness of quantum computations. The 25x speedup in circuit execution allows for the more efficient running of complex quantum algorithms, bringing the field closer to demonstrating quantum advantage for practical problems. The ‘Starling’ initiative aims to scale up to 200 logical qubits, with modular cryogenic systems designed to support this expansion and facilitate the implementation of advanced error correction schemes, ensuring the overall reliability of quantum operations.

Background & Context

The quantum computing industry has long grappled with the dual challenges of increasing qubit counts while simultaneously reducing error rates and enhancing operational speeds. IBM’s Nighthawk r2 directly addresses these challenges, positioning the company at the forefront of quantum hardware innovation. The pursuit of fault-tolerant quantum computers, as exemplified by the Starling roadmap, is a critical endeavor, as it unlocks the potential for practical applications in areas such as financial modeling, advanced materials science, and drug discovery. IBM continues to be a key driver in defining the trajectory of quantum technology development.

Strategic Significance & Outlook

IBM’s aggressive roadmap outlines a clear path towards the realization of more powerful and reliable quantum computers in the coming years. The performance gains from Nighthawk r2 serve as a foundational element for the Starling project, which is envisioned to evolve into systems with thousands of logical qubits. Such advancements are expected to enable solutions to problems currently intractable for classical supercomputers, potentially leading to transformative impacts across scientific research and industrial sectors. The ongoing progress in modular design and error correction techniques will be pivotal in accelerating the commercial deployment and widespread adoption of quantum computing.

Source: https://www.ibm.com/quantum/blog/nighthawk-r2

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