Convenient numerical package generating CPTP dynamical maps for driven quantum systems

We report on a numerically efficient Python package for simulating the state evolution of open quantum systems. With the input of a time-dependent system Hamiltonian, a list of system-bath coupling operators, and associated noise spectra, this package produces completely positive and trace-preserving (CPTP) dynamical maps describing the evolution of the system density matrix. The numerical calculation is based on the Keldysh formalism and can incorporate driven Hamiltonians and non-Markovian noise. We also report on progress toward calculating the next-to-leading-order correction to the dissipative dynamics, useful for analyzing multi-photon decoherence processes.