Anharmonic quantum mechanical systems do not feature phase space trajectories

@article{Oliva2018AnharmonicQM,
  title={Anharmonic quantum mechanical systems do not feature phase space trajectories},
  author={Maxime Oliva and Dimitris Kakofengitis and Ole Steuernagel},
  journal={Physica A: Statistical Mechanics and its Applications},
  year={2018}
}
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