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Lookup NU author(s): Dr Jonte HanceORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
It has been conjectured that counterfactual communication is impossible, even for post-selected quantum particles. We strongly challenge this by proposing precisely such a counterfactual scheme where—unambiguously—none of Alice’s photons that correctly contribute to her information about Bob’s message have been to Bob. We demonstrate counterfactuality experimentally by means of weak measurements, and conceptually using consistent histories—thus simultaneously satisfying both criteria without loopholes. Importantly, the fidelity of Alice learning Bob’s bit can be made arbitrarily close to unity.
Author(s): Salih H, McCutcheon W, Hance JR, Rarity J
Publication type: Article
Publication status: Published
Journal: npj Quantum Information
Year: 2022
Volume: 8
Online publication date: 18/05/2022
Acceptance date: 20/04/2022
Date deposited: 08/04/2024
ISSN (electronic): 2056-6387
Publisher: Nature Publishing Group
URL: https://doi.org/10.1038/s41534-022-00564-w
DOI: 10.1038/s41534-022-00564-w
Data Access Statement: Data obtained during experiments undertaken during this experiment is available at https://doi.org/10.5281/zenodo.5666675.
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