Espinós, H.Panadero, I.García-Ripoll, J.J.Torrontegui Muñoz, Erik2023-04-132023-04-132023-04Espinós, H., Panadero, I., García-Ripoll, J. J., & Torrontegui, E. (2023). Quantum control of tunable-coupling transmons using dynamical invariants of motion. Quantum science and technology, 8(2), 025017.2058-9565https://hdl.handle.net/10016/37058We analyze the implementation of a fast nonadiabatic CZ gate between two transmon qubits with tunable coupling. The gate control method is based on a theory of dynamical invariants which leads to reduced leakage and robustness against decoherence. The gate is based on a description of the resonance between the 11 and 20 using an effective Hamiltonian with the six lowest energy states. A modification of the protocol allows us to take into account the higher-order perturbative corrections of this effective model. This enables a gate fidelity several orders of magnitude higher than other quasiadiabatic protocols, with gate times that approach the theoretical limit.17eng© 2023 The Author(s).Atribución 3.0 EspañaSuperconducting circuitsQuantum controlQuantum computingresearch articleEnergías RenovablesFísicahttps://doi.org/10.1088/2058-9565/acbed7open access12, 02501717Quantum Science and Technology8AR/0000032525