Information causality as a physical principle

@article{Pawowski2009InformationCA,
  title={Information causality as a physical principle},
  author={Marcin Pawłowski and Tomasz Paterek and Dagomir Kaszlikowski and Valerio Scarani and Andreas J. Winter and Marek Żukowski},
  journal={Nature},
  year={2009},
  volume={461},
  pages={1101-1104}
}
Quantum physics has remarkable distinguishing characteristics. For example, it gives only probabilistic predictions (non-determinism) and does not allow copying of unknown states (no-cloning). Quantum correlations may be stronger than any classical ones, but information cannot be transmitted faster than light (no-signalling). However, these features do not uniquely define quantum physics. A broad class of theories exist that share such traits and allow even stronger (than quantum) correlations… 
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