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The Classical Backbone Stayed When the Quantum State Was Noisy
DS-NOCI couples an accessible reference space to correlated quantum states so an incomplete ansatz cannot displace the stable lower-level description.
Summary
DS-NOCI couples an accessible reference space to correlated quantum states so an incomplete ansatz cannot displace the stable lower-level description.
With exact matrix elements, the combined variational space cannot have a higher ground-state energy than either component alone. Molecular benchmarks also showed resilience to imperfect amplitudes and noisy matrices. The method is a formulation and benchmark result, not a claim of fault-tolerant hardware.
Why it matters
DS-NOCI couples an accessible reference space to correlated quantum states so an incomplete ansatz cannot displace the stable lower-level description.
Limits and context
- With exact matrix elements, the combined variational space cannot have a higher ground-state energy than either component alone.
- The method is a formulation and benchmark result, not a claim of fault-tolerant hardware.
Key claims
DS-NOCI couples an accessible reference space to correlated quantum states so an incomplete ansatz cannot displace the stable lower-level description.
Qualification: With exact matrix elements, the combined variational space cannot have a higher ground-state energy than either component alone.
Evidence: source-2026-09-07-021
Sources
- arXiv preprint 2609.04387arXiv · primary research
Corrections
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