Qutip

This open-source software provides capabilities for simulating the dynamics of open quantum systems. It relies on established numerical packages such as NumPy, SciPy, and Cython, with graphical output handled by Matplotlib. The library is designed for user-friendly and efficient numerical simulations across a wide range of Hamiltonians, including those with arbitrary time-dependence.

It is widely used in various physics applications, including quantum optics, trapped ions, superconducting circuits, and quantum nanomechanical resonators. Being freely available on all major platforms (Linux, Mac OSX, Windows) and free of licensing fees, it is well-suited for both classroom education and advanced research.

Used globally in research universities, government labs, and corporations developing quantum computers, it has seen over a million downloads. A large community provides support for tackling complex simulation challenges.