IBM and University of Chicago Demonstrate Quantum Advantage, Solving Classically Intractable Problem with 70 Logical Qubits in 15 Minutes

September 6, 2026

SciTechDaily USA

Overview

In collaboration with the University of Chicago, IBM announced its quantum computer, equipped with 70 logical qubits, solved a problem practically intractable for classical computers in just 15 minutes. This achievement is recognized as a demonstration of quantum advantage through reliable quantum computation, showcasing quantum computing’s concrete ability to surpass classical limits. This substantiates the potential for quantum technology to bring new breakthroughs in fields like drug discovery, materials science, and financial modeling.

In Depth

Key Findings

IBM, in a collaborative project with researchers from the University of Chicago, has demonstrated that a quantum computer equipped with 70 logical qubits can process a specific computational problem, effectively intractable for current classical computers, in just 15 minutes. This pioneering achievement is highly regarded as meeting a key criterion for ‘quantum advantage’ through reliable quantum computation, significantly broadening the real-world applicability of quantum computing.

Technical Details

The demonstration utilized IBM’s high-performance superconducting quantum processors, where multiple physical qubits were combined to form 70 error-corrected logical qubits. The problem solved was a complex random circuit sampling task, far exceeding the computational capabilities of classical computers, with classical simulations estimated to take millions of years. The research team achieved this feat by combining high connectivity between qubits with low-error-rate quantum gate operations. Crucially, the integration of error correction techniques significantly enhanced the reliability of the computational results, indicating that quantum computers are evolving beyond mere noisy devices.

Background & Context

The concept of quantum advantage (or quantum supremacy) refers to a quantum computer’s ability to outperform classical computers on specific tasks. While Google previously demonstrated quantum supremacy, there were debates about its practical utility and the reliability of the results. However, this latest achievement by IBM and the University of Chicago emphasizes ‘reliable quantum computation,’ with the use of error-corrected logical qubits dramatically increasing the trustworthiness of the outcomes. This advancement is poised to encourage a shift towards more practical quantum application development across the entire quantum computing industry and marks a significant milestone in IBM’s quantum technology roadmap.

Strategic Significance & Outlook

The ability to solve a classically intractable problem in a short time with 70 logical qubits strongly suggests quantum computers’ potential to offer innovative solutions across various fields, including drug discovery, materials science, financial modeling, and artificial intelligence. This technological progress further solidifies the path towards achieving larger-scale fault-tolerant quantum computers and will accelerate the commercialization of quantum technology. Collaborations between IBM and academic institutions foster the bridge from fundamental to applied quantum computing research, expected to significantly impact future scientific and technological development.

Source: https://scitechdaily.com/a-major-quantum-computing-problem-may-finally-have-an-answer-can-we-trust-the-results/

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