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We present an open-source computer program written in Python language forquantum measurement and related issues. In our program, quantum states andoperators, including quantum gates, can be developed into a quantum-objectfunction represented by a matrix. Build into the program are severalmeasurement schemes, including von Neumann measurement and weak measurement.Various numerical simulation methods are used to mimic the real experimentresults. We first provide an overview of the program structure and then discussthe numerical simulation of quantum measurement. We illustrate the program'sperformance via quantum state tomography and quantum metrology. The program isbuilt in a general language of quantum physics and thus is widely adaptable tovarious physical platforms, such as quantum optics, ion traps, superconductingcircuit devices, and others. It is also ideal to use in classroom guidance withsimulation and visualization of various quantum systems.

tqix: A toolbox for Quantum in X: Quantum measurement, quantum tomography, quantum metrology, and others