Qubit ZooProposes and demonstrates a tunable coupling architecture for superconducting qubits using a frequency-tunable transmon as a coupler between two fixed-frequency qubits. The effective qubit-qubit coupling can be tuned from positive through zero to negative, enabling high-fidelity two-qubit gates with suppressed always-on ZZ interaction. This architecture became the foundation for Google Sycamore and IBM Eagle/Heron processors.
Links
- Journal: Phys. Rev. Applied 10, 054062 (2018)
- arXiv: 1803.09813