Quandary provides optimal control for open quantum systems via an optimization solver. The underlying quantum dynamics model open quantum systems, using the Lindblad master equation to evolve a density matrix in time. With this latest release, Quandary can solve either Lindblad’s master equation for the density matrix (open quantum systems), or Schrödinger’s equation for the state vector if no collapse operators are present (closed quantum systems). The latter drastically reduces the computational complexity; however, system interactions with the environment are not considered in this model.
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