Experimental Realization of a C-Shunt Flux-Qubit Coupler for Controlled-Z Gates between Transmons

quant-ph

Submitted: 2026-10-13

Updated: 2026-10-13

Comments: 14 pages, 6 figures

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

Sources

• 2D transmons with lifetimes and coherence times exceeding 1 millisecond
• Sensitivity-Adapted Closed-Loop Optimization for High-Fidelity Controlled-Z Gates in Superconducting Qubits
• Demonstration of low-overhead quantum error correction codes
• Scaling and logic in the color code on a superconducting quantum processor
• High-Precision Calibration Workflow Achieves Above $99.9\%$ CZ Gate Fidelity on a Scalable Superconducting Processor
• ZZ-Free Two-Transmon CZ Gate Mediated by a Fluxonium Coupler

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