# 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}
}
• Published 14 May 2009
• Computer Science
• Nature
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…
567 Citations
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## References

SHOWING 1-10 OF 45 REFERENCES
Information processing in generalized probabilistic theories
A framework in which a variety of probabilistic theories can be defined, including classical and quantum theories, and many others, is introduced, and a tensor product rule for combining separate systems can be derived.
Quantum Communication Complexity
It is well known that entanglement on its own is useless for the transmission of information, but there are distributed tasks that cannot be accomplished at all in a classical world when communication is not allowed, but that become possible if the non-communicating parties share prior entanglements.
Limit on nonlocality in any world in which communication complexity is not trivial.
• Computer Science
Physical review letters
• 2006
A partial answer to the question why are the correlations achievable by quantum mechanics not maximal among those that preserve causality is given by showing that slightly stronger correlations would result in a world in which communication complexity becomes trivial.
Secrecy extraction from no-signaling correlations
• Computer Science
• 2006
Quantum cryptography shows that one can guarantee the secrecy of correlation on the sole basis of the laws of physics, that is, without limiting the computational power of the eavesdropper. The usual
A single quantum cannot be cloned
• Physics
Nature
• 1982
If a photon of definite polarization encounters an excited atom, there is typically some nonvanishing probability that the atom will emit a second photon by stimulated emission. Such a photon is
Nonlocality and communication complexity
• Computer Science, Physics
• 2010
The area of quantum communication complexity is reviewed, and it is shown how it connects the foundational physics questions regarding non-locality with those of communication complexity studied in theoretical computer science.
Negative entropy and information in quantum mechanics
• Physics, Computer Science
• 1997
A framework for a quantum mechanical information theory is introduced that is based entirely on density operators, and gives rise to a unified description of classical correlation and quantum
Oblivious transfer and quantum non-locality
• Computer Science, Mathematics
Proceedings. International Symposium on Information Theory, 2005. ISIT 2005.
• 2005
This work shows a close connection, in a cryptographic sense, between OT and the "PR primitive," and shows that unconditional OT can be achieved from a single realization of PR, and vice versa.
Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels.
• Bennett
• Physics
Physical review letters
• 1993
An unknown quantum state \ensuremath{\Vert}\ensuremath{\varphi}〉 can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical Einstein-Podolsky-Rosen