A multimode cable between two transmon qubits can be tuned to cancel the ZZ interaction while keeping the XX interaction strong, enabling simulated CZ and iSWAP gates with fidelities above 99%.
For CZ gates, the qubit frequencies are tuned from the ZZ off region into |11, 00ð − |20, 00ð or |11, 00ð − |02, 00ð resonance, as indicated by the green dashed lines in Fig
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High-contrast interaction between remote superconducting qubits mediated by multimode cable coupling
A multimode cable between two transmon qubits can be tuned to cancel the ZZ interaction while keeping the XX interaction strong, enabling simulated CZ and iSWAP gates with fidelities above 99%.