We present an open-source computer program written in Python language for quantum measurement and related issues. In our program, quantum states and operators, including quantum gates, can be developed into a quantum-object function represented by a matrix. Build into the program are several measurement schemes, including von Neumann measurement and weak measurement. Various numerical simulation methods are used to mimic the real experiment results. We first provide an overview of the program structure and then discuss the numerical simulation of quantum measurement. We illustrate the program’s performance via quantum state tomography and quantum metrology. The program is built in a general language of quantum physics and thus is widely adaptable to various physical platforms, such as quantum optics, ion traps, superconducting circuit devices, and others. It is also ideal to use in classroom guidance with simulation and visualization of various quantum systems.

Program summary

Program Title: tqix: A toolbox for Quantum in X

X: Quantum measurement, quantum tomography, quantum metrology, and others.

CPC Library link to program files: https://doi.org/10.17632/wxvncw5jkv.1

Developer’s repository link: https://vqisinfo.wixsite.com/tqix

Code Ocean capsule: https://codeocean.com/capsule/0814109

Licensing provisions: GPLv3

Programming language: Python

External routines: NumPy, SciPy, Matplotlib.

Nature of problem: tqix is an open-source program providing some convenient tools for quantum measurement, quantum tomography, quantum metrology, and others.

Solution method: For quantum measurement, the von Neumann formalism and weal measurement have been used, where the measurement results can be obtained analytically or numerically (simulation) via various back-ends, including the Monte Carlo (mc) and Cumulative Distribution Function (cdf). There is also built-in quantum state tomography using the direct state measurement method, and some common tools for studying quantum metrology.

中文翻译：

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tqix：X中Quantum的工具箱

我们提供了一种用Python语言编写的开源计算机程序，用于量子测量和相关问题。在我们的程序中，可以将量子态和算子（包括量子门）开发成由矩阵表示的量子对象函数。该程序中内置了几种测量方案，包括冯·诺依曼测量和弱测量。使用各种数值模拟方法来模拟真实的实验结果。我们首先提供程序结构的概述，然后讨论量子测量的数值模拟。我们通过量子状态层析成像和量子计量学说明了该程序的性能。该程序以量子物理学的通用语言构建，因此可广泛适用于各种物理平台，例如量子光学，离子阱，超导电路器件等。理想的是在课堂指导中使用各种量子系统的仿真和可视化。

计划摘要

程序名称： tqix：X中Quantum的工具箱

X：量子测量，量子层析成像，量子计量学以及其他。

CPC库链接到程序文件： https : //doi.org/10.17632/wxvncw5jkv.1

开发人员的资料库链接： https : //vqisinfo.wixsite.com/tqix

代码海洋胶囊： https : //codeocean.com/capsule/0814109

许可条款： GPLv3

编程语言： Python

外部例程： NumPy，SciPy，Matplotlib。

问题的性质： tqix是一个开源程序，为量子测量，量子层析成像，量子计量学等提供了一些方便的工具。

求解方法：对于量子测量，使用了冯·诺依曼形式和财富测量，可以通过包括蒙特卡洛（mc）和累积分布函数（cdf）在内的各种后端以解析或数字方式（模拟）获得测量结果。）。还使用直接状态测量方法内置了量子状态层析成像技术，以及一些用于研究量子计量学的常用工具。