Author

Xinsheng Tan

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Preprint Sep 2026

Parametric DRAG for leakage-suppressed exchange gates in superconducting qubits

Programmable exchange interactions support quantum gates and many-body simulation in superconducting circuits. Fast excitation transfer, however, opens two leakage pathways in weakly anharmonic transmons, degrading gates and driving simulated dynamics outside the encoded state space. We introduce parametric derivative...

Yi-Wen Li, Xin-Sheng Tan, Yang Yu · 0 citations

Preprint Jul 2026

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

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 $L=SU(3)\otimes SU(3)$. Since $\dim SU(9)=80$ and $5\dim L=80$, this is the shortest fixed-core architecture not excluded by parameter counti...

Yurui Liu, Ruoting Dou, Peng Xu et al. · 0 citations