Variational quantum circuits' Fourier coefficients are correlated in ansatz-specific ways, and the new Fourier coefficient correlation metric predicts their training performance better than expressibility in the tested cases.
Challenges and opportunities in quantum machine learning
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Fourier Fingerprints of Ansatzes in Quantum Machine Learning
Variational quantum circuits' Fourier coefficients are correlated in ansatz-specific ways, and the new Fourier coefficient correlation metric predicts their training performance better than expressibility in the tested cases.