Barren plateaus arise from destructive interference in gradient contributions, diagnosed by cancellation ratio R_k and effective term count N_eff,k, with the Hamiltonian variational ansatz escaping the random-sign regime on the transverse-field Ising model while the hardware-efficient ansatz doesnot
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Barren Plateaus as Destructive Interference: A Diagnostic Framework and Implications for Structured Ansatzes
Barren plateaus arise from destructive interference in gradient contributions, diagnosed by cancellation ratio R_k and effective term count N_eff,k, with the Hamiltonian variational ansatz escaping the random-sign regime on the transverse-field Ising model while the hardware-efficient ansatz doesnot