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quant-ph2026
Hidden selection rules and amplitude ceilings in quantum Fourier models
Pavel Sulimov, Claude Lehmann
Quantum models with Pauli data encodings compute trigonometric polynomials whatever channels, ancillas and outcome-averaged measurements follow, so their expressivity depends on th…
quant-ph2026
Certification cost of quantum models: measurement correlation, not parameter count
Pavel Sulimov, Claude Lehmann
Reporting the Fisher geometry of a trained variational quantum model is routine; quoting the shot budget that would establish it is not. Certifying an empirical Fisher matrix to re…