source: ScienceDaily AI: IBM quantum computer solves classically intractable problem in 15 minutes
level: research
ibm and university of chicago researchers completed a quantum computation that leading classical methods could not practically reproduce. the system used 70 error-corrected logical qubits and finished the task in roughly 15 minutes. the experiment also provided statistical evidence that the result was reliable. this work represents one of the largest demonstrations of logical quantum computing reported so far. the circuits and experimental results have been made publicly available through the quantum advantage tracker.
the team used a structured alternative to random circuit sampling that preserves computational hardness while allowing error detection. they operated 70 logical qubits, performed 2,415 logical two-qubit operations and 468 logical t gates. effective logical error rates were 10 times lower than physical error rates. leading classical simulation methods would face prohibitive runtimes for the same task. the quantum computer completed the computation in approximately 15 minutes.
verification remains a major challenge in establishing quantum advantage. this experiment develops techniques to characterize the fidelity of hard quantum states under noise. error correction and trustworthy verification are essential for scaling quantum computers to more difficult problems. the demonstration advances both goals at once. ibm says this milestone gives scientists, developers, and businesses a new foundation for trusting quantum computers as they scale.
why it matters: this shows quantum computers can solve problems beyond classical reach while providing evidence the answer is correct, a key step toward practical quantum computing.
source: ScienceDaily AI: IBM quantum computer solves classically intractable problem in 15 minutes