Data for <i>Cloaking a qubit in a cavity</i>.

<br>This repository contains the source data for the article "Cloaking a qubit in a cavity" by Cristóbal Lledó, Rémy Dassonneville, Adrien Moulinas, Joachim Cohen, Ross Shillito, Audrey Bienfait, Benjamin Huard, and Alexandre Blais, <i>Nat Commun</i> <b>14</b>, 6313 (2023). Link to article: https://doi.org/10.1038/s41467-023-42060-5Figure 2, Vacuum Rabi oscillations in a filled cavity:For panel <b>b</b>, data file "Figure-2_Panel-b_Color-scale-normalization-limits.npy" is an array [min, max] used for the normalization of the color scale plotted with Matplotlib's contourf.Figure 3, Cancellation of the ac-Stark shift and measurement-induced dephasing:For panel <b>a</b>, the data files for the spectral densities are organized in 2D arrays of dimensions 6x907183. Each row correspond to a different value of the drive amplitude, ordered in increasing strength.All other files include a single 1D array.Figure 4, Arm and release qubit readout:The error bars in panel <b>b</b> are one over the square root of the number of shots N=5 x 10^5.Figure 5, Gate error:Data file "Figure-5_No-drives-X-gate-error.npy" is a 1x2 array [avg_error, error_bar] with the average X-gate error and its associated error bar for the case of no cavity nor cancellation drives. This corresponds to the gray shaded area in the figure.Data file "Figure-5_Numerical-X-gate-error-with-cancellation.npy" contains a single datum corresponding to the average gate error obtained from numerical simulations. This corresponds to the dashed red horizontal line in the figure.Supplementary Figure1, Numerical X-gate average error:Data files "Supplementary-Figure-1_Panel-b_Y-axis_Errors.npy", "Supplementary-Figure-1_Panel-c_Y-axis_Errors.npy", and "Supplementary-Figure-1_Panel-d_Y-axis_Errors.npy" contain a 4x21, 4x51, and 4x51 array, respectively. In each of these arrays, each row correspond to a different value of the drive amplitude, ordered in increasing strength.Supplementary Figure 2, Predicted X-gate average error accounting for the Purcell cavity:Data file "Supplementary-Figure-2_X-gate-error-with-cancellation.npy" contains a single datum corresponding to the average gate error obtained with cancellation. This corresponds to the dashed red horizontal line in the figure.Supplementary Figure 5, Readout overlap error comparison for standard disperive and arm-and-release methods:The gray vertical and horizontal lines are at 7.132 and 0.154, respectively. The phase is in units of 2pi, so it goes from -1/2 to +1/2.

本仓库包含由Cristóbal Lledó、Rémy Dassonneville、Adrien Moulinas、Joachim Cohen、Ross Shillito、Audrey Bienfait、Benjamin Huard及Alexandre Blais共同发表的论文《Cloaking a qubit in a cavity》（《腔中量子比特隐身操控》）的源数据，该论文发表于《自然·通讯》（*Nat Commun*）**第14卷**，文章编号6313（2023年）。论文链接：https://doi.org/10.1038/s41467-023-42060-5

## 图2 填充腔中的真空拉比振荡（Vacuum Rabi oscillations）：
对于面板b，数据文件`Figure-2_Panel-b_Color-scale-normalization-limits.npy`为用于归一化色阶的[min, max]数组，用于配合Matplotlib的`contourf`函数绘图。

## 图3 交流斯塔克位移（ac-Stark shift）与测量诱导退相消的抵消：
对于面板a，光谱密度的数据文件组织为维度6×907183的二维数组，每一行对应一组不同的驱动振幅取值，按强度递增顺序排列。其余所有文件均为单一维数组。

## 图4 臂型与释放型量子比特读出：
面板b中的误差棒为采样次数N=5×10^5的倒数平方根。

## 图5 门误差：
数据文件`Figure-5_No-drives-X-gate-error.npy`为1×2数组`[avg_error, error_bar]`，对应无腔驱动且无抵消驱动情况下的平均X门误差（X-gate error）及其误差棒，对应图中的灰色阴影区域。
数据文件`Figure-5_Numerical-X-gate-error-with-cancellation.npy`包含单个数值，对应通过数值模拟得到的平均门误差，对应图中的红色虚线水平线。

## 补充图1 数值X门平均误差：
数据文件`Supplementary-Figure-1_Panel-b_Y-axis_Errors.npy`、`Supplementary-Figure-1_Panel-c_Y-axis_Errors.npy`及`Supplementary-Figure-1_Panel-d_Y-axis_Errors.npy`分别为4×21、4×51和4×51的数组。在每个数组中，每一行对应一组不同的驱动振幅取值，按强度递增顺序排列。

## 补充图2 考虑珀塞尔腔（Purcell cavity）的预测X门平均误差：
数据文件`Supplementary-Figure-2_X-gate-error-with-cancellation.npy`包含单个数值，对应通过抵消方案得到的平均门误差，对应图中的红色虚线水平线。

## 补充图5 标准色散型与臂型-释放型读出方法的读出重叠误差（readout overlap error）对比：
灰色垂直线与水平线分别位于7.132和0.154处。相位以2π为单位，取值范围为-1/2至+1/2。

搜集汇总

背景与挑战

背景概述

该数据集是2023年发表于《Nature Communications》文章《Cloaking a qubit in a cavity》的源数据，用于支持量子物理中量子比特在腔体中隐形技术的研究。数据集包含多个图表对应的实验数据文件，涉及真空拉比振荡、ac-Stark位移取消、量子门误差等关键量子现象，为量子计算和腔量子电动力学领域提供实证分析基础。