Fig. 1. Experimental setup and control system: (a) Hybrid trapping system that traps and simultaneously; (b) control system for generating laser and microwave signals. 实验装置和控制系统　(a) 同时囚禁 离子和 离子的混合囚禁系统及相关能谱图; (b) 微波和激光信号的控制系统

Fig. 2. Pulse sequence for dyanmical decoupling: (a) CPMG protocol; (b) protocol. 动力学解耦脉冲序列　(a) CPMG方案; (b) 方案

Fig. 3. Typical phase noise measured by spectrum analyzer.频谱分析仪测得的典型相位涨落噪声谱

Fig. 4. (a) Ramsey contrasts depending on the total evolution time T for various numbers of pulses N in the dynamical decoupling sequence; (b) the noise spectra analized from the measured data in Fig. (a). (a) 执行包含 个脉冲的动力学解耦序列, 不同的总演化时间 对应的条纹对比度; (b) 通过分析图(a)中的数据得到的环境噪声谱

Fig. 5. Sequence fidelity p_l as a function of the sequence length l. 序列保真度随序列长度的变化

Fig. 6. Pulse sequences for measuring the single-qubit coherent time.测量单量子比特相干时间的脉冲序列

Fig. 7. Single-qubit coherece time for six different initial states. For and , the coherence time is (4740 1760) s. For the other four initial states, the coherence time is (667 17) s. The error bars are the standard deviation. 单量子比特六个不同初态的相干时间, 其中 和 , 对应的相干时间是(4740 1760) s; 其他四个初态对应的相干时间为(667 17) s; 图中的误差线代表标准差