Decomposing Gradient Suppression in Barren Plateaus: Activity, Sign Organization, and Coupling

arXiv:2605.01319 · quant-ph, cs.LG · Submitted 2026-05-02 · Read on arXiv

quant-ph, cs.LG

Submitted: 2026-05-02

Updated: 2026-08-26

Comments: Substantially revised and retitled (previously "Barren Plateaus as Destructive Interference: A Diagnostic Framework and Implications for Structured Ansatzes"). Adds an exact three-factor decomposition of the gradient second moment, a microscopic sign-alignment analysis, and replication on the longitudinal-field Ising model

Code: https://github.com/pilsungk/BP-DI

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Alignment — 13× in this paper · explained in 1 episode
• Quantum Circuits — 5× in this paper · explained in 2 episodes
• Aggregation — 4× in this paper · explained in 1 episode
• Consistency — 2× in this paper · explained in 3 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Hilbert Space — 1× in this paper · explained in 2 episodes

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