An efficient scheme is proposed for implementing fast population transfer in a superconducting qutrit via shortcut to adiabaticity (STA) with optimized drivings. An artificial atom of Cooper-pair box, having sufficient level anharmonicity, resonantly interacts with two classical microwave drivings. At two-photon resonance, the dynamical behavior of the qutrit can be described by a two-state system. By the technique of STA of counterdiabatic driving, the non-adiabatic coupling between two eigenstates can be nullified. Without increasing the number of applied drivings, we can implement the target state transfer only by modifying two original Gaussian-type pulses. Compared with the pulses required by the invariant-based operation, the modified pulses have the time profiles that are more accessible in experiment. With the available decoherence rates, high-fidelity population transfer can be obtained numerically. The strategy could offer a promising avenue towards optimized control over superconducting qutrits experimentally.

提出了一种有效的方案，用于通过优化驱动的绝热捷径 (STA) 在超导 qutrit 中实现快速种群转移。库珀对盒的人工原子具有足够的能级非谐性，与两个经典的微波驱动共振相互作用。在双光子共振下，qutrit 的动力学行为可以用双态系统来描述。通过逆绝热驱动STA技术，可以消除两个本征态之间的非绝热耦合。在不增加施加驱动次数的情况下，我们只需修改两个原始高斯型脉冲即可实现目标状态转移。与基于不变量的操作所需的脉冲相比，修改后的脉冲具有在实验中更容易获得的时间曲线。使用可用的退相干率，可以通过数值获得高保真人口转移。该策略可以为通过实验优化控制超导量子点提供一条有前途的途径。