Fig. 1. Calculated trajectory of phase particle with experiment parameters for junction 3: , 10^–4, γ = 0.9306. Vertical axis . 计算得到的相位粒子在相空间中的运动轨迹　纵坐标 , 计算采用的实验参数为 , γ = 0.9306

Fig. 2. Microwave response curves obtained by Eq. (5) (curves) and numerical simulation (error bars), for junction ( μA, Q = 515.7) with applied microwave for the curves with the maximum amplitude from small to large respectively. Dot-dash line shows the dependence of where corresponding to the maximum oscillation amplitude on the power of the applied microwave. 结( μA, Q = 515.7)在不同的微波驱动下, (5)式(曲线)和模拟(误差棒)得到的响应振幅b随归一直流偏置 的函数变化关系, 响应曲线按其最大振幅从小到大顺序对应的外加微波强度分别为 和 , 点划线显示了最大振幅对应的 随外加微波强度的变化

Fig. 3. as a function of for different parameters of sample Josephson junctions in Table 1. Lines are results of Eq. (7). Error bars are numerical simulation results of . The lines of slops from small to large corresponding to Q values: 163.0 (junction 1), 508.6 (junction 2), 1549.1 (junction 3). 表1中三个样品结的 随 的变化关系图, 线是(7)式的结果, 误差棒是 的数值模拟结果, 图中直线斜率从小到大分别对应Q值163.0(结1), 508.6(结2), 1549.1(结3)

Fig. 4. as a function of for different quality factors. Lines are Eq. (7)’s results. Error bars are numerical simulation results of . The lines of slops from small to large corresponding to Q values: 51.6, 257.8, 515.7, 1533.0 accounting for junction 2 with different environment influences. 结2在不同的电路环境下, 导致不同的品质因子Q (51.6, 257.8, 515.7, 1533.0, 对应直线斜率从小到大)时, 随 的变化关系, 直线是(7)式的结果, 误差棒是 的数值模拟结果

Table 1. Parameters of Josephson junctions used in numerical simulations.

Table 2. Experiment settings used in numerical simulations.