QI is a package for Mathematica computer algebra system developed to support symbolic analysis of quantum states and operations.
Package funcionality is defined in QI.m, QIExtras.m, QINisq.m, and QIWalks.m files, whish should be placed in Applications subdirectory in .Mathematica directory (on Unix-based systems).
The main package can be loaded
<<QI`
Less common functionality is available in QIExtras package
<<QIExtras`
Functions relevant for NISQ computing are available in QINisq package.
<<QINisq`
Basic functionality for simulating unitary quantum walks is are available in QIWalks package.
<<QIWalks`
Documentation, including description of all functions, is available in doc subdirectory.
J.A. Miszczak, Z. Puchała, P. Gawron, QI package for analysis of quantum states and operations, 2011-, https://github.com/iitis/qi
Parts of the packages were also described in J.A. Miszczak, Singular values decomposition and matrix reorderings in quantum information theory, International Journal of Modern Physics C, Vol. 22, No. 09, pp. 897-918 (2011). DOI:10.1142/S0129183111016683, arXiv:1011.1585.
@article{miszczak2011singular,
title={Singular value decomposition and matrix reorderings in quantum information theory},
author={Miszczak, Jaros{\l}aw Adam},
journal={International Journal of Modern Physics C},
volume={22},
number={09},
pages={897--918},
year={2011},
publisher={World Scientific},
doi = {10.1142/S0129183111016683},
url = {https://arxiv.org/abs/1011.1585}
}