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QuTiP: An open-source Python framework for the dynamics of open quantum systems


We present QuTiP, an object-oriented open-source framework for solving the dynamics of open quantum systems. The QuTiP framework is written in a combination of Python and Cython, and using SciPy, NumPy and matplotlib to provide an environment for computational quantum mechanics that is easy and efficient to use. Arbitrary quantum systems, including time-dependent systems, may be built up from operators and states defined by a quantum object class, and then passed on to a choice of unitary and dissipative evolution solvers. We give an overview of the basic structure for the framework and the techniques used in its implementation. We also present a few selected examples from contemporary research on quantum mechanics that illustrate the strengths of the framework, and the types of calculation that can be performed. The framework described here is particularly well suited to the fields of quantum optics, superconducting circuit devices, nanomechanics, and trapped ions, while also being ideal as an educational tool.

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