Iterative algorithm for reconstruction of entangled states

@article{ehek2001IterativeAF,
  title={Iterative algorithm for reconstruction of entangled states},
  author={Jaroslav Řeh{\'a}{\vc}ek and Zdeněk Hradil and Miroslav Je{\vz}ek},
  journal={Physical Review A},
  year={2001},
  volume={63},
  pages={040303}
}
An iterative algorithm for the reconstruction of an unknown quantum state from the results of incompatible measurements is proposed. It consists of Expectation-Maximization step followed by a unitary transformation of the eigenbasis of the density matrix. The procedure has been applied to the reconstruction of the entangled pair of photons. 

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