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Quantum Counterfactual Communication is the recently-proposed idea of using quantum mechanics to send messages between two parties, without any particles travelling between them. While this has excited massive interest, both for potential `un-hackable' communication, and insight into the foundations of quantum mechanics, it has been asked whether this phenomena is truly quantum, or could be performed classically. We examine counterfactuality, both classical and quantum, and the protocols proposed so far, and conclude it must be quantum, at least insofar as it requires particle quantisation.
Original languageEnglish
Publication statusAccepted/In press - 17 Sep 2019

Bibliographical note

4+3 pages, 4 figures, edited for clarity and conciseness, Consistent Histories section revised

Structured keywords

  • Centre for Science and Philosophy
  • Centre_for_science_and_philosophy


  • quant-ph
  • physics.hist-ph
  • 81P45, 81P05, 94A05, 81V80

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