SUN-VQC claims to avoid barren plateaus by using SU(4) exponential blocks, but the dynamical-Lie-algebra argument is invalid for the brick-wall circuit in the experiments.
Performance comparison of optimization methods on variational quantum algorithms,
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Special-Unitary Parameterization for Trainable Variational Quantum Circuits
SUN-VQC claims to avoid barren plateaus by using SU(4) exponential blocks, but the dynamical-Lie-algebra argument is invalid for the brick-wall circuit in the experiments.