固态人工原子的脉冲定标和非绝热控制
Pulse calibration and non-adiabatic control of solid-state artificial atoms
摘要:
人工原子中的跃迁,通过避免能级交叉的非线性驱动,可以通过仔细设计驱动协议来控制。我们已经用一个大振幅的射频场驱动了一个超导持续电流量子比特。通过应用由数字源产生的双谐波波形,我们展示了在源处产生的谐波的幅度和相位与由设备接收的谐波的幅度和相位之间的映射。这使我们能够在设备上对实际波形进行成像。该信息用于设计期望的时间依赖性,如通过与模拟的详细比较所确认的。
英文摘要:
Transitions in an artificial atom, driven non-adiabatically through an energy-level avoided crossing, can be controlled by carefully engineering the driving protocol. We have driven a superconducting persistent-current qubit with a large-amplitude, radio-frequency field. By applying a bi-harmonic waveform generated by a digital source, we demonstrate a mapping between the amplitude and phase of the harmonics produced at the source and those received by the device. This allows us to image the actual waveform at the device. This information is used to engineer a desired time dependence, as confirmed by detailed comparison with simulation.
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