Quantum state discrimination

@article{Barnett2008QuantumSD,
  title={Quantum state discrimination},
  author={S. Barnett and S. Croke},
  journal={Advances in Optics and Photonics},
  year={2008},
  volume={1},
  pages={238-278}
}
It is a fundamental consequence of the superposition principle for quantum states that there must exist nonorthogonal states, that is, states that, although different, have a nonzero overlap. This finite overlap means that there is no way of determining with certainty in which of two such states a given physical system has been prepared. We review the various strategies that have been devised to discriminate optimally between nonorthogonal states and some of the optical experiments that have… Expand
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