Time-optimal universal control of two-level systems under strong driving
Time-optimal universal control of two-level systems under strong driving
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DOI：
10.1103/physrevb.89.245311
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发表时间：
2014-02
影响因子：
3.7
通讯作者：
C. Avinadav;R. Fischer;P. London;D. Gershoni
中科院分区：
文献类型：
--
作者：
C. Avinadav;R. Fischer;P. London;D. Gershoni
我们报道了在有限振幅的单个强驱动场下任意单量子比特转动的时间最优构造的理论和实验研究。利用金刚石中氮空位中心的辐射修饰态，我们实现了一个强驱动的二能级系统，驱动频率是其进动频率的四倍。我们在该系统上实现了时间最优的普适旋转，利用量子过程层析成像对其性能进行了表征，并展示了一种双轴多脉冲控制序列，其中量子比特在时间尺度上的旋转速度快于其进动周期。我们的结果为快速量子比特控制和高密度脉冲方案在量子信息处理和量子计量学领域的应用铺平了道路。
We report on a theoretical and experimental study of time-optimal construction of arbitrary single-qubit rotations under a single strong driving field of finite amplitude. Using radiation-dressed states of nitrogen vacancy centers in diamond we realize a strongly driven two-level system, with driving frequencies four times larger than its precession frequency. We implement time-optimal universal rotations on this system, characterize their performance using quantum process tomography, and demonstrate a dual-axis multiple-pulse control sequence where the qubit is rotated on time scales faster than its precession period. Our results pave the way for applying fast qubit control and high-density pulse schemes in the fields of quantum information processing and quantum metrology.