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Hardware Noise, Not Expressibility, Stopped the Quantum Simulation
At four lattice sites, 1% depolarizing noise drove mean error as high as 52.81%.
Summary
At four lattice sites, 1% depolarizing noise drove mean error as high as 52.81%.
A two-flavor Schwinger-model study scales variational circuits from two to six staggered lattice sites and separates expressibility, trainability and hardware noise. Its noiseless four-site control reached 0.12% mean error, while the same circuit under 1% depolarizing noise reached 25.69% to 52.81%. The result is a model-specific diagnosis, not a bound for all quantum simulations.
Why it matters
At four lattice sites, 1% depolarizing noise drove mean error as high as 52.81%.
Limits and context
- The result is a model-specific diagnosis, not a bound for all quantum simulations.
Key claims
At four lattice sites, 1% depolarizing noise drove mean error as high as 52.81%.
Qualification: The result is a model-specific diagnosis, not a bound for all quantum simulations.
Evidence: source-2026-09-28-018
Sources
- arXiv preprint 2609.30496arXiv · primary research
Corrections
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