Towards high-fidelity two-qubit gates: Static ZZ Suppression via Multipath Coupling in inductively coupled fluxonium qubits - part II

Compared to capacitive coupling, inductively coupled fluxoniums provide enhanced hybridization of computational states, facilitating entanglement with suppressed ZZ crosstalk. Utilizing a tunable coupler, high-fidelity gates between inductively coupled fluxonium qubits were demonstrated. [1] Here we demonstrate the implementation of static ZZ suppression through multipath coupling in directly inductively coupled fluxonium qubits. This scheme, designed for high-fidelity gate operations, can benefit advancing fluxonium-based quantum processors and broadening the horizons of universal quantum computing. This part, we present analysis of gate operations for these multipath coupled fluxonium qubits.

[1] arXiv preprint arXiv:2309.0572 (2023)