Information causality is a physical principle suggested in 2009.[1] Information Causality states that information gain that a receiver (Bob) can reach about data, previously unknown to him, from a sender (Alice), by using all his local resources and classical bits communicated by the sender, is at most bits.
The principle assumes classical communication: if quantum bits were allowed to be transmitted the information gain could be higher as demonstrated in the quantum superdense coding protocol [this is debatable as superdense coding requires sending as many qubits - including auxiliary channels - as there are classical bits to transfer]. The principle is respected by all correlations accessible with quantum physics, while it excludes all correlations which violate the quantum Tsirelson bound for the CHSH inequality. However, it does not exclude beyond-quantum correlations in multipartite situations.[2]
information, causality, physical, principle, suggested, 2009, information, causality, states, that, information, gain, that, receiver, reach, about, data, previously, unknown, from, sender, alice, using, local, resources, displaystyle, classical, bits, communi. Information causality is a physical principle suggested in 2009 1 Information Causality states that information gain that a receiver Bob can reach about data previously unknown to him from a sender Alice by using all his local resources and n displaystyle n classical bits communicated by the sender is at most n displaystyle n bits The principle assumes classical communication if quantum bits were allowed to be transmitted the information gain could be higher as demonstrated in the quantum superdense coding protocol this is debatable as superdense coding requires sending as many qubits including auxiliary channels as there are classical bits to transfer The principle is respected by all correlations accessible with quantum physics while it excludes all correlations which violate the quantum Tsirelson bound for the CHSH inequality However it does not exclude beyond quantum correlations in multipartite situations 2 See also editTsirelson s bound Quantum nonlocalityReferences edit Pawlowski Marcin Paterek Tomasz Kaszlikowski Dagomir Scarani Valerio Winter Andreas Zukowski Marek 2009 Information causality as a physical principle Nature 461 7267 1101 1104 arXiv 0905 2292 Bibcode 2009Natur 461 1101P doi 10 1038 nature08400 ISSN 0028 0836 PMID 19847260 S2CID 4428663 Gallego Rodrigo Wurflinger Lars Erik Acin Antonio Navascues Miguel 2011 11 15 Quantum Correlations Require Multipartite Information Principles Physical Review Letters 107 21 210403 arXiv 1107 3738 Bibcode 2011PhRvL 107u0403G doi 10 1103 physrevlett 107 210403 ISSN 0031 9007 PMID 22181861 S2CID 31107416 nbsp This quantum mechanics related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Information causality amp oldid 1087466553, wikipedia, wiki, book, books, library,
