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Researchers at the Flatiron Institute have demonstrated that classical tensor network methods can match or exceed the accuracy of D-Wave's quantum annealers when simulating Ising spin glass dynamics in two and three dimensions. This finding challenges recent claims of quantum advantage for this specific class of problems, suggesting that classical algorithms remain highly competitive for many-particle system simulations. The results highlight the ongoing complexity in establishing a definitive computational edge for quantum hardware in these domains.

Surse care acoperăPhysics World, organiser.org, Quantum Zeitgeist, The Quantum Insider

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No quantum advantage (yet) in the world of tensor networks

Physics World21 august 20265 min de cititArticolul și perspectiva sunt în engleză.

Classical computation is more accurate that quantum annealer for some Ising spin glasses The post No quantum advantage (yet) in the world of tensor networks appeared first on Physics World.

strong>Tensor networks pictographic scheme Each tensor is represented by an array of dimension N, that matches its number of indices. By joining the legs (indices) of each tensor, it is possible to encode the Hamiltonian or the state of a many-particle system. (Courtesy: Lucy Reading-Ikkanda/Simons Foundation) Researchers at the Flatiron Institute in New York City have used a new tensor network (TN) scheme to simulate how Ising spin glasses evolve in time. In many cases, their classical method is more accurate than the latest quantum annealers running the same problem. The results…

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