GoKawiilIBM and University of Chicago demonstrate quantum advantage with verifiable 70-qubit result
IBM and University of Chicago researchers used a new error-correction technique to encode 70 logical qubits and complete a random circuit sampling task in roughly 15 minutes, a computation that would take leading classical supercomputers an impractical amount of time. The team also designed a more structured circuit approach to verify that the quantum output was actually correct, addressing a longstanding challenge in confirming quantum results once problems exceed classical checking ability. The circuits and data have been published via the Quantum Advantage Tracker.
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Quantum advantage claims have often been hard to trust because once a calculation surpasses classical simulation, checking its accuracy becomes nearly impossible without unproven assumptions about the hardware. This demonstration is notable because it pairs a hard-to-simulate task with a verifiable method for confirming the answer, a combination researchers have struggled to achieve together. It marks a significant step toward establishing confidence in large-scale logical qubit systems as a practical computing resource.
- 70 logical qubits were encoded using a new error-correction strategy for the experiment.
- The quantum computation took about 15 minutes versus an impractical duration for classical methods.
- The approach also solves the difficulty of verifying quantum results once they exceed classical checking capability.
Quantum Computation and Quantum Information" by Nielsen & Chuang — If IBM's 70 logical qubits and error-corrected circuits left you wanting the real math behind them, this is the classic textbook the field runs on. It walks through qubits, quantum circuits, error correction and fidelity measures—exactly the concepts underpinning this random circuit sampling result.
See Quantum Computation and Quantum Information" by Nielsen & Chuang on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: sciencedaily.com, 2026-08-30
Published there as: “IBM quantum computer solves classically intractable problem in 15 minutes”
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