|Title||Proposal for Entangling Gates on Fluxonium Qubits via a Two-Photon Transition|
|Publication Type||Journal Article|
|Year of Publication||2021|
|Authors||K. N. Nesterov, Q. Ficheux, V. E. Manucharyan, and M. G. Vavilov|
|Date Published||JUN 22|
|Type of Article||Article|
We propose a family of microwave-activated entangling gates on two capacitively coupled fluxonium qubits. A microwave pulse applied to either qubit at a frequency near the half-frequency of the vertical bar 00 >-vertical bar 11 > transition induces two-photon Rabi oscillations with a negligible leakage outside the computational subspace, owing to the strong anharmonicity of fluxoniums. By adjusting the drive frequency, amplitude, and duration, we obtain the gate family that is locally equivalent to the fermionic-simulation gates such as root SWAP-like and controlled-phase gates. The gate error can be tuned below 10(-4) for a pulse duration under 100 ns without excessive circuit parameter matching. Given that the fluxonium coherence time can exceed 1 ms, our gate scheme is promising for large-scale quantum processors.