Approximate Dynamics Lead to More Optimal Control: Efficient Exact Derivatives

@article{Jensen2020ApproximateDL,
  title={Approximate Dynamics Lead to More Optimal Control: Efficient Exact Derivatives},
  author={Jesper Hasseriis Mohr Jensen and F. Moller and J. J. S{\o}rensen and J. Sherson},
  journal={arXiv: Quantum Physics},
  year={2020}
}
Accurate derivatives are important for efficiently locally traversing and converging in quantum optimization landscapes. By deriving analytically exact control derivatives (gradient and Hessian), it is shown here that the feasibility of meeting this central accuracy requirement critically depends on the choice of propagation scheme and problem representation. Even when exact propagation is sufficiently cheap it is, perhaps surprisingly, much more efficient to optimize the (appropriately… Expand
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