Raw data : Three wave mixing vacuum squeezing generation in a SNAIL-based Traveling-Wave Parametric Amplifier with alternated flux polarity

The experimental raw data used to generate figures presented in the article "Three wave mixing vacuum squeezing generation in a SNAIL-based Traveling-Wave Parametric Amplifier with alternated flux polarity" are available as follows:

Fig. 2 (b)_idler gen.npz: This is a .npz file containing experimental raw data of power spectral density measured in dBm with a spectrum analyzer at room temperature as a function of flux (raw data used for Fig. 2 (b)).

Fig. 3 (a,b).npz: This is a .npz file containing experimental raw data for gain as a function of pump phase for two flux points (raw data used for Fig. 3 (a, b)). 

Fig. 3 (c-h): This is a folder in zip format containing raw quadrature data in Full Scale (FS) presto units used for Fig 3 (c, d, e and g). The folder contains the following files:

Phi1_(0,360,5)_off_list.npz: This file contains pump OFF-quadrature data for flux Phi1 as a function of the pump phase over the range 0°–360°, with a step size of 5°. For each phase value, we acquire 3 X 10^6  (X_{FS}, P_{FS}) quadrature pairs (raw pump OFF data used for Fig. 3 (c));

Phi1_on_list.npz: This file contains pump ON raw quadrature data for flux Phi1 (raw pump ON data used for Fig. 3 (c));

Phi1_hs.npz: This file contains both pump OFF and pump ON quadrature data for high-statistics experiments reported in Fig. 3(e); we acquire 8 X 10^6 (X_{FS}, P_{FS}) quadrature pairs.

Phi2_off_(0,360,10)_list.npz: This file contains pump OFF-quadrature data for flux Phi2 as a function of the pump phase over the range 0°–360°, with a step size of 10°. For each phase value, we acquire 1 X 10^6  (X_{FS}, P_{FS}) quadrature pairs (raw pump OFF data used for Fig. 3 (d));

Phi2_on_list.npz: This file contains pump ON raw quadrature data for flux Phi2 (raw pump ON data used for Fig. 3 (d));

Phi2_hs.npz: This file contains both pump OFF and pump ON quadrature data for high-statistics experiment reported in Fig. 3(g); We acquire 8 X 10^6 (X_{FS}, P_{FS}) quadrature pairs.

Fig. 4 (a,b): This is a .npz file containing raw gain data vs. pump power for two flux bias points; pump power ranges from −50 to −10 dBm in 1 dBm steps (raw data used for Fig. 4(a,b)).

Fig. 4 (c): This is a folder in zip format containing raw quadrature data in Full Scale (FS) Presto units as a function of pump power. Each .npz file includes both pump OFF and pump ON raw quadrature data at the signal and idler frequencies. The pump power array spans −50 to −10 dBm, with variable step sizes: 5 dBm (−50 to −30), 0.5 dBm (−29 to −13.5), and 1 dBm (−13 to −10), with a pump frequency of 7.705 GHz and a frequency detuning of 31 MHz from half of the pump frequency. For each power value, we acquire 1 X 10^6 (X_{FS}, P_{FS}) quadrature pairs at both signal and idler frequencies (raw data used for Fig. 4 (c)).

Fig. 4 (d): This is a folder in zip format containing raw quadrature data in Full Scale (FS) Presto units as a function of pump power. Each .npz file includes both pump OFF and ON raw quadrature data at the signal and idler frequencies. The pump power array spans −50 to −11 dBm with different spacing: 5 dBm steps from −50 to −35 dBm, followed by 1 dBm steps from -29 to -28 and -22 to -21 dBm, other than that 0.5 dBm step from −27.5 to −15 dBm range and 1 dBm steps from −14 to −11 dBm with a pump frequency of 7.705 GHz and a frequency detuning of 61 MHz from half of the pump frequency. For each power value, we acquire 1 X 10^6 (X_{FS}, P_{FS}) quadrature pairs at both signal and idler frequencies (raw data used for Fig. 4 (d)).

Fig. 5: This .npz file contains high-statistics quadrature data at the signal and idler frequencies for both pump-OFF and pump-ON, with a pump frequency of 7.705 GHz and a frequency detuning of 31 MHz from half of the pump frequency. We acquire 8 X 10^6 (X_{FS}, P_{FS}) quadrature pairs at both signal and idler frequencies (raw data used for Fig. 5 (a)).

APPENDIX D: This is a folder in zip format that contains .npz files for the noise power spectral density measured in dBm with a spectrum analyzer as a function of SNTJ bias voltage at the frequencies mentioned in the article: f_p/2 (half_pump.npz), f_p/2+31 MHz (Phi1_idler.npz), f_p/2-31 MHz (Phi1_signal.npz), f_p/2+61 MHz (Phi2_idler.npz), f_p/2-61 MHz (Phi2_signal.npz), and f_p+31 MHz (4WM_idler.npz), where f_p = 7.705 GHz.

本文《基于SNAIL的交替磁通极性行波参量放大器中的三波混频真空压缩产生》（Three wave mixing vacuum squeezing generation in a SNAIL-based Traveling-Wave Parametric Amplifier with alternated flux polarity）中展示图表所用的实验原始数据如下：

Fig. 2 (b)_idler gen.npz：该.npz格式文件包含室温下由频谱分析仪测得的、随磁通变化的功率谱密度（以dBm为单位）的实验原始数据，即用于绘制图2(b)的原始数据。

Fig. 3 (a,b).npz：该.npz格式文件包含两个磁通点下增益随泵浦相位变化的实验原始数据，即用于绘制图3(a、b)的原始数据。

Fig. 3 (c-h)：为zip格式文件夹，包含用于绘制图3(c、d、e和g)的满量程（Full Scale, FS）Presto单位下的原始正交数据。该文件夹包含以下文件：
Phi1_(0,360,5)_off_list.npz：该文件包含磁通为Phi1时，泵浦关闭状态下的正交数据，其泵浦相位范围为0°~360°，步长为5°。针对每个相位值，我们采集了3×10^6组(X_{FS}, P_{FS})正交对，即用于绘制图3(c)的泵浦关闭原始数据。
Phi1_on_list.npz：该文件包含磁通为Phi1时，泵浦开启状态下的原始正交数据，即用于绘制图3(c)的泵浦开启原始数据。
Phi1_hs.npz：该文件包含图3(e)中报道的高统计量实验所用的泵浦关闭与泵浦开启状态下的正交数据，我们采集了8×10^6组(X_{FS}, P_{FS})正交对。
Phi2_off_(0,360,10)_list.npz：该文件包含磁通为Phi2时，泵浦关闭状态下的正交数据，其泵浦相位范围为0°~360°，步长为10°。针对每个相位值，我们采集了1×10^6组(X_{FS}, P_{FS})正交对，即用于绘制图3(d)的泵浦关闭原始数据。
Phi2_on_list.npz：该文件包含磁通为Phi2时，泵浦开启状态下的原始正交数据，即用于绘制图3(d)的泵浦开启原始数据。
Phi2_hs.npz：该文件包含图3(g)中报道的高统计量实验所用的泵浦关闭与泵浦开启状态下的正交数据，我们采集了8×10^6组(X_{FS}, P_{FS})正交对。

Fig. 4 (a,b)：该.npz格式文件包含两个磁通偏置点下，增益随泵浦功率变化的原始数据；泵浦功率范围为-50~-10 dBm，步长为1 dBm，即用于绘制图4(a、b)的原始数据。

Fig. 4 (c)：为zip格式文件夹，包含满量程（Full Scale, FS）Presto单位下、随泵浦功率变化的原始正交数据。每个.npz文件均包含信号频率与闲频频率下的泵浦关闭与泵浦开启原始正交数据。泵浦功率数组范围为-50~-10 dBm，步长可变：-50~-30 dBm区间步长为5 dBm，-29~-13.5 dBm区间步长为0.5 dBm，-13~-10 dBm区间步长为1 dBm；泵浦频率为7.705 GHz，与泵浦频率半值的频率失谐量为31 MHz。针对每个功率值，我们在信号频率与闲频频率下均采集了1×10^6组(X_{FS}, P_{FS})正交对，即用于绘制图4(c)的原始数据。

Fig. 4 (d)：为zip格式文件夹，包含满量程（Full Scale, FS）Presto单位下、随泵浦功率变化的原始正交数据。每个.npz文件均包含信号频率与闲频频率下的泵浦关闭与泵浦开启原始正交数据。泵浦功率数组范围为-50~-11 dBm，步长设置如下：-50~-35 dBm区间步长为5 dBm，-29~-28 dBm与-22~-21 dBm区间步长为1 dBm，-27.5~-15 dBm区间步长为0.5 dBm，-14~-11 dBm区间步长为1 dBm；泵浦频率为7.705 GHz，与泵浦频率半值的频率失谐量为61 MHz。针对每个功率值，我们在信号频率与闲频频率下均采集了1×10^6组(X_{FS}, P_{FS})正交对，即用于绘制图4(d)的原始数据。

Fig. 5：该.npz格式文件包含泵浦关闭与泵浦开启状态下、信号频率与闲频频率处的高统计量正交数据，泵浦频率为7.705 GHz，与泵浦频率半值的频率失谐量为31 MHz。我们在信号频率与闲频频率下均采集了8×10^6组(X_{FS}, P_{FS})正交对，即用于绘制图5(a)的原始数据。

APPENDIX D：为zip格式文件夹，包含以dBm为单位、由频谱分析仪测得的噪声功率谱密度的.npz格式文件，这些数据随SNTJ偏置电压变化，对应本文中提及的频率：f_p/2 (half_pump.npz)、f_p/2+31 MHz (Phi1_idler.npz)、f_p/2-31 MHz (Phi1_signal.npz)、f_p/2+61 MHz (Phi2_idler.npz)、f_p/2-61 MHz (Phi2_signal.npz)以及f_p+31 MHz (4WM_idler.npz)，其中f_p=7.705 GHz。