Entropy and wigner functions

@article{Manfredi2000EntropyAW,
  title={Entropy and wigner functions},
  author={Manfredi and Feix},
  journal={Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics},
  year={2000},
  volume={62 4 Pt A},
  pages={
          4665-74
        }
}
  • Manfredi, Feix
  • Published in
    Physical review. E…
    2000
  • Physics, Medicine
  • The properties of an alternative definition of quantum entropy, based on Wigner functions, are discussed. Such a definition emerges naturally from the Wigner representation of quantum mechanics, and can easily quantify the amount of entanglement of a quantum state. It is shown that smoothing of the Wigner function induces an increase in entropy. This fact is used to derive some simple rules to construct positive-definite probability distributions which are also admissible Wigner functions. 

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