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v2 Quandary for open and closed quantum control

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@steffi7574 steffi7574 released this 26 Jan 06:24

Quandary can now solve either Lindblad's master equation for the density matrix (open quantum systems), or Schroedinger's equation for the state vector if no collapse operators are present (closed quantum systems). The latter drastically reduces the computational complexity, however system interaction with the environment are not taken into account in this model.

Changelog:

  • Solving Schroedinger's equation, if collapse_type == none. In that case, the system state is described by a vector of dimension N, rather than N^2.
  • Configuration option for the objective function changed: Previously 'Jhilbertschmidt' now 'Jtrace'
  • Adding a leakage term to the objective function that penalizes occupation of the highest modeled energy level per oscillator (guard level).