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technology5h ago
Scientists solved a major quantum physics problem once thought impossible for classical computers
- Researchers show a laptop-based classical method can reproduce quantum machine results on a complex spin-system problem.
- The team used three-dimensional tensor networks and belief propagation to capture quantum states without full configuration tracking.
- Classical results aligned with the D-Wave quantum machine on the studied spin-glass simulation, challenging claims of quantum supremacy.
- The study suggests earlier supremacy claims may have overlooked useful classical tricks.
- The researchers plan to push toward harder problems relevant to real quantum materials and superconductors.
- The work appears in the journal Science, contributing to the ongoing discussion about quantum versus classical approaches.
- Belief propagation and tensor networks were key tools enabling efficient, approximate simulations on conventional hardware.
- Three-dimensional modeling provided an advantage over simpler two-dimensional reductions used in earlier work.
- Earth.com notes that the quantum supremacy claim centers on 'beyond classical' results and real-world hardware advantage.
- The study emphasizes that the line between what laptops can handle and quantum machines can do is still moving.
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