QSW_MPI: a framework for parallel simulation of quantum stochastic walks

QSW_MPI is a python package developed for the modeling of quantum stochastic walks, a generalization of the classical random walk and continuous-time quantum walk in the Lindblad formalism. This model allows for the study of a wide range of Markovian open quantum systems subject to varying degrees of incoherent scattering. Consisting of a python interface built on parallelized Fortran libraries utilizing sparse data structures; QSW_MPI is scalable to massively parallel computers, making possible the simulation of walks on graphs with many thousands of vertices. QSW_MPI also provides explicit support for an extension of the standard quantum stochastic walk model to the study of non-Hermitian absorption and emission processes.