论文标题
使用动力不变的运动不变的量子控制可调耦合式传输
Quantum control of tunable-coupling transmons using dynamical invariants of motion
论文作者
论文摘要
我们分析了两个具有可调耦合的transmon QU之间的快速非绝热CZ门的实现。栅极控制方法基于动力不变的理论，从而导致降低泄漏和稳健性针对逆转。该门是基于对$ | 11 \ rangle $和$ | 20 \ rangle $使用有效的哈密顿量的$ | 11 \ rangle $之间的描述。对不变式方法的修改使我们可以考虑到该有效模型的高阶扰动校正。这使栅极保真度比其他准绝热协议高几个数量级，其栅极时间接近理论极限。
We analyse the implementation of a fast nonadiabatic CZ gate between two transmon qubits with tuneable 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 $|11\rangle$ and $|20\rangle$ using an effective Hamiltonian with the 6 lowest energy states. A modification of the invariants method 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.
