A personal laptop helped solve a quantum physics problem once claimed to be beyond the reach of classical computers

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An ordinary laptop solved a problem thought to require a quantum computer A personal laptop helped solve a quantum physics problem once claimed to be beyond the reach of classical computers. Date: July 20, 2026 Source: Simons Foundation Summary: A quantum problem once described as impossible for classical computers has now been solved using relatively modest hardware. Researchers used tensor networks to compress the overwhelming wave function created by hundreds of entangled qubits, allowing some calculations to run on a laptop. Their results matched both theoretical predictions and simulations performed with a quantum computer. The method could open new paths for exploring quantum dynamics and materials.

It also says: The researchers are now developing methods that go beyond systems made only of qubits. Their next goal is to model electrons that can move between different sites.