Local Universality and Structural Certificates for Minimal Fixed-Depth Two-Qutrit Gate Decomposition

Yurui Liu, Ruoting Dou, Peng Xu +4

We study a dimension-saturating fixed-core ansatz in which four copies of a fixed, non-tunable two-qutrit core $K\in SU(9)$ are interleaved with five adjustable local layers from $…