Flatiron Institute Tensor Network Algorithm Overturns Historical D-Wave Quantum Supremacy Claim - Quantum Computing Report

Physicists at the Center for Computational Quantum Physics (CCQ) at the Simons Foundation’s Flatiron Institute, in collaboration with Boston University, have developed a classical algorithm that successfully simulates complex three-dimensional quantum dynamics previously claimed to be impossible without a quantum computer. Published in Science, the study refutes a high-profile “beyond-classical” computation milestone reported in March 2025 by researchers utilizing D-Wave Systems’ 5,000-qubit Advantage2 superconducting quantum annealing processor. By repurposing and optimizing decades-old data compression and mathematical routing techniques, the CCQ team proved that classical workstations—and in some configurations, standard commercial laptops—can achieve state-of-the-art accuracy when calculating highly entangled quantum state progressions. [...]

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